How to make better decisions than 99% of people

The filter, the traits, and the daily habits behind every great decision.

The summer of 1994. A 1988 Chevy Blazer drives west toward Seattle. MacKenzie Bezos is at the wheel. Her husband Jeff is in the passenger seat, typing a business plan on a laptop balanced on his knees.

He had quit his job only weeks earlier. A senior vice president at D. E. Shaw, the New York hedge fund where he had been on track to make partner. He had not quit because he was sure. He had quit because of a question he had asked himself a few months before, sitting at his desk in Manhattan.

He projected himself forward to age 80 and looked back. Would I regret not having tried this internet thing? The answer came in a second. He could live with trying and failing. He could not live with never having tried.

That was the moment. Not the resignation, not the long drive. The instant the test was set honestly enough to give him an answer he could not unhear.

Most of us remember this story as a story about courage. It is not. It is a story about a method. Bezos did not have a vision. He had a filter. And the filter protected him from the one thing he could not undo, which was getting to 80 and finding out he had been too careful at 30.

You make 30,000 decisions today, and most of them will cost you nothing. Just 3 or 4 this year will decide what your next 10 look like. Nobody ever taught you the difference.

By the end of this you will have a simple system you can actually use. Here is what you will learn:

• Why the best decisions are trained, not a matter of being smart.

• The 4 traits every great decider shares, all of which you can build.

• The one filter that tells you which decisions are worth slowing down for.

• How to judge a decision by the choice you made, not the way it happened to turn out.

• The 3 habits and 5 questions that make better decisions almost automatic.

II – What the science actually found

For most of the 20th century, economists modeled you as a rational actor. Weighing costs against benefits. Acting in your long-term interest. The last 50 years of research have shown that almost none of that is true.

We do not decide the way we think we decide.

In 1979, Daniel Kahneman and Amos Tversky published a paper that won Kahneman the Nobel Prize 23 years later. They showed that humans do not weigh gains and losses the same way. Losing $100 feels roughly twice as bad as winning $100 feels good. A whole shelf of behavioral economics rests on this one finding. I have written about its consequences in a separate article on the seven biases that run your life.

Kahneman split the mind into 2 systems. System 1 is fast and automatic, running on instinct and memory. System 2 is slow and deliberate, the part you think of as you. The uncomfortable part is this. System 1 makes most of your decisions before System 2 wakes up. You do not reason your way to a choice and then act. You act, then reason your way to a story about why you did.

So the real question is not how to think more carefully in the moment. It is whether the fast mind has learned the right patterns. And sometimes what it has learned is extraordinary.

Gary Klein, a psychologist who studied firefighters, described a commander who hosed down a kitchen fire for 30 seconds, then suddenly ordered everyone out of the building. He could not have told you why. Moments later the floor collapsed. The fire had been in the basement the whole time, burning under their feet.

What the commander felt was not a sixth sense. Across 20 years of fires, his mind had built a model of how a normal kitchen fire behaves, sounds, and feels on the skin. This fire broke the model. It was too quiet for that much heat. He registered that something was wrong before he could explain what, and that single unexplained judgment saved his crew.

That is what a decision actually is. Not a calm calculation with every fact on the table. A pattern, matched against everything you have seen before, in under a second, mostly without your permission. The firefighter decides this way. So does the investor, the founder, the man deciding whether to leave the job he has outgrown.

The difference between them is not intelligence. It is whether the pattern fits the situation.

Klein and Kahneman spent years arguing about exactly this. One had studied experts whose instincts were brilliant. The other had studied ordinary people whose instincts were predictably wrong. They settled on one line. Gut decisions can be trusted when 2 things are true. The world is regular enough to form real patterns, and the feedback is fast enough to correct them.

A firefighter has both. A trader in a panicked market has neither. The same instinct that pulls the commander off a collapsing floor talks the trader into doubling down on a losing position.

Which tells you where good decision-making actually lives. Not in thinking harder once the moment arrives, because by then the moment is already gone. It lives in the work you do before the decision, and in the few deliberate questions you force the choice through when you know your gut cannot be trusted.

That is the real difference between the people who decide well and everyone else. Their instinct is not sharper than yours. They have simply stopped letting it decide alone. On the choices that actually matter, they slow down and run the decision past a filter first, the way Bezos did in that car. And once you start looking, the people who do this well all share the same handful of traits.

III – What the best deciders have in common

If it is not intelligence, then what is it?

I went looking for the thing great deciders share, expecting it to be raw mental horsepower. It is not. Some of the most expensive decisions in history were made by people with genius-level IQs, and some of the best were made by people who never finished school.

What they share sits somewhere else, and it comes down to 4 habits of mind. Not one of them is something you are born with. You can build every single one.

1) They move before they feel ready

Jeff Bezos has a rule for this. Most decisions, he says, should be made with around 70% of the information you wish you had. Wait for 90 and you are not being careful, you are being slow, and slow carries a cost that never shows up on any invoice. The good decider acts at 70 and corrects along the way. The poor one keeps waiting for a certainty that never comes.

2) They know the edge of what they know

Charlie Munger built much of his fortune on one idea he calls the circle of competence. What protects you is not how much you know. It is whether you know where your knowledge ends. The dangerous moment is never plain ignorance. It is ignorance you have mistaken for understanding. Socrates got there 2,000 years earlier, when he said that knowing the limit of what you know is the beginning of wisdom.

3) They think in odds, not certainties

Most people treat a decision as a verdict, something that will turn out to have been right or wrong. The best deciders treat it as a bet. They ask 2 questions where the rest of us ask 1. What are the odds this works, and can I live with what happens if it does not. Annie Duke, a professional poker player who became a decision scientist, summed up a whole life at the table in one line.

The quality of your life is the sum of your decision quality and your luck.
— Annie Duke

Once you see a choice as a bet, you stop chasing a certainty that was never on offer, and you start looking honestly at the downside before you commit to it.

4) They go looking for why they are wrong

This is the one almost nobody does. The moment we lean toward a choice, we spend our energy collecting reasons we are right. Charles Darwin spent his life doing the opposite. He followed what he called a golden rule. Whenever he came across a fact that went against his theory, he wrote it down at once, because he had learned that the mind loses inconvenient facts far faster than convenient ones. Warren Buffett says the same thing in plainer words.

When you find information that contradicts what you already believe, you have a special obligation to look at it, and quickly.
— Warren Buffett

The trait is not intelligence. It is the discipline to attack your own idea before reality gets the chance.

Now hold those four up against a real case.

In 1994 a hedge fund called Long-Term Capital Management opened with 2 Nobel laureates on its board and an average IQ well north of 160. For its first 3 years it looked unstoppable, returning 21%, then 43%, then 41%. Then the world did something its models had ruled out as nearly impossible, and in under 4 months the fund lost $4.6 billion and almost took the banking system down with it.

Here is the strange part. They had the first trait in abundance. Nobody acted faster or with more conviction. What they were missing were the other 3.

They mistook their models for certainty when they were only ever holding odds. They had no feel for where those models stopped describing the real world. And when the losses began, they went looking for reasons they were still right instead of reasons they were wrong, so they doubled down all the way to zero.

That is the whole lesson in a single fund. Decisiveness without the other 3 traits is not brilliance. It is a confident walk off a cliff.

The firefighter from the last section had none of their credentials and every one of the traits they lacked, and he walked his men out of that house alive.

They did not know more than the people who failed. They decided better. And the first filter they all reach for, before any other, is so simple it sounds like it could not possibly carry that much weight.

IV – The one filter that simplifies everything

Here is the filter. It fits inside a single question. Can I undo this?

In his 2015 letter to shareholders, Jeff Bezos split every decision a person can make into 2 kinds. Some are one-way doors. You walk through, the door shuts behind you, and there is no way back to the room you left.

Others are two-way doors. You walk through, look around, and if you do not like what you find, you walk back out and try something else, the way you can leave a job you just took or return something you just bought.

What Bezos noticed next is the part worth keeping. Most decisions are two-way doors, and we spend our lives treating them as if they were one-way.

Shane Parrish, who has spent years studying how the best operators decide, draws the same line from the other end. The only decisions that deserve to be slow are the ones that are both heavy and hard to reverse. Everything else should be fast, because the cost of getting it wrong is just the cost of doing it again.

Watch what people actually do instead.

They spend 3 weeks researching a $400 laptop they could return inside 30 days. Then they say yes to a job in a new city over a single dinner, because the person across the table was excited and the moment felt good. They pour their care into the door that swings both ways and rush straight through the one that locks behind them.

So before you spend another hour on a decision, run it through 3 questions.

• Can I undo this in a month?

• Can I undo this in a year?

• Can I undo this at all?

If the honest answer is that you can walk it back, decide quickly and move on. Save your slow, careful, sleepless attention for the doors that only open once. Most of your life is reversible. You have simply been living as though it were not.

Reversibility tells you how much care a decision deserves. It does not tell you when to deal with it. That is the second cut, and it is just as simple. Almost everything that lands on you is one of three things.

• Now, if it is important and cannot wait.

• Later, if it matters but does not need you today.

• Never, because a surprising number of decisions never really needed you, and they resolve themselves the moment you stop picking at them.

Most people run both cuts backwards. They treat every small thing as urgent and every irreversible thing as routine. Learning to sort decisions as they arrive, by how reversible and how urgent each one is, is most of what a calm mind actually does all day.

You can set this whole thing up with pen and paper, right there on your desk. Write each task or decision on its own sticky note, a single line in thick black marker. Sort the notes into three small piles, now and later and never, and work only from the now pile.

When something is done, do not just cross it off. Take the note, crumple it in your hand, and drop it into a bowl. It sounds childish until you try it. Watching that bowl fill up does something a checked box never will, because your mind treats the crumpled paper as the task itself, finished and gone, and the progress you can suddenly see pulls you straight into the next one.

Building all of this into a single system you run every morning, decisions and tasks together, is the whole subject of the follow-up to this article.

Even with both cuts working, you will still make calls that turn out badly. The filter improves your odds. It was never going to hand you certainty. So what do the best deciders do when a decision they made well goes on to blow up in their face?

V – Judge the decision, not the result

February 1st, 2015. Just 26 seconds left in the Super Bowl. The Seattle Seahawks are sitting on the New England 1-yard line, down by 4, with one of the best running backs in football standing in their backfield. Everyone watching knows what is coming. You hand the ball to Marshawn Lynch and let him pound it across for the win.

Instead, coach Pete Carroll calls for a pass. The throw is intercepted at the goal line, and Seattle loses the championship.

Within minutes it is being called the worst play call in the history of the sport. And here is the part almost nobody wanted to hear. It was a good decision. A pass in that exact situation was intercepted only a tiny fraction of the time, and the clock and the rules made it the smart percentage play. The ball simply landed on the wrong side of the odds. Asked about it afterward, Carroll refused to call it a mistake.

It was the worst result of a call ever.
— Pete Carroll

The result was a disaster. The thinking behind it, he insisted, was sound.

We almost never separate those two things, and the failure to separate them has a name. Annie Duke, who spent 2 decades winning at high-stakes poker before she started teaching decision-making, calls it resulting.

We look at how a choice turned out, and then we rate the choice by the result. If it ended well, we decide it was smart. If it ended badly, we decide it was foolish. It feels like plain common sense, and it is the single most expensive habit in this entire article.

It costs so much because every outcome is a mix of 2 very different ingredients, the quality of your decision and the roll of the dice. Resulting drops them both in a blender.

You make a careful, well-reasoned call, it goes wrong because the luck broke against you, and you swear never to decide that way again. A good process gets thrown out over one unlucky result. Meanwhile the reckless gamble that happened to pay off gets remembered as brilliance, and off you go to repeat it.

I can already hear the objection. This sounds academic, and in the real world the result is what you have to live with. That is fair. But if the result is the only thing you ever study, you walk away with nothing you can use next time, because the next situation will be different and the luck will be different along with it. The one thing that carries over is the quality of your thinking.

So the best deciders run a different test, usually at the end of the day. They take the calls they made and ask themselves a single question.

“Would I make this same decision again, knowing only what I knew at the time?”

If the answer is yes, the decision was sound, and whatever happened afterward was simply the luck of the draw. If the answer is no, the decision was weak, and a happy ending would have been luck in the other direction. Both of them deserve the same honest look.

And the easiest way to keep that look honest is to write the decision down before you know how it ends, what you expected, how sure you felt, and why you chose what you chose. Read it back a month later, and you can no longer rewrite the story of what you actually believed at the time.

That habit is called a decision journal, and it is one of only a few routines that truly change how well you decide over time. In the next section, we will go through the rest of them, the handful of daily habits and self-reflection questions that help you make better decisions, day after day, for the rest of your life.

VI – The habits and the questions

You do not need 12 techniques. Almost everything the best deciders do comes down to 2 simple moves, plus the journal you already met, plus a few questions worth keeping in your back pocket.

1) Write the decision down before you know how it ends

You met this one already. Before a real choice, take 2 minutes to note what you are deciding, what you expect to happen, and how sure you feel. Months later that note becomes the only honest record of who you were when you decided, untouched by how things turned out. Most people keep no such record, which is exactly why most people repeat the same mistake and call it bad luck.

2) Imagine it has already failed

Before you commit to something that matters, picture yourself a year from now, standing in the wreckage of the plan. It fell apart. Now ask why. Gary Klein, the psychologist behind the firefighter story, calls this a premortem, and it works because it lets you see the problems your own hope keeps hiding from you. Seneca was running the same exercise 2,000 years ago and called it the premeditation of evils, not to make himself miserable but to make himself ready.

There is a quick companion to this. Stop asking how long your own plan will take and ask how long it took everyone who tried before you. When Kahneman and his team guessed at their own project, they said 2 years. The honest figure from similar projects was 7 to 10, and some never finished at all.

Your plan always looks faster from the inside. Trust the people who already walked the road, and once you have seen how the thing can fail, leave yourself room, a little extra cash and a little extra time, so that one bad break does not end the game.

3) Turn the question upside down

Most people facing a decision ask how to make it work. The best deciders ask the opposite. How would I guarantee this fails, and how do I avoid precisely that? The mathematician Carl Jacobi summed up his whole method in one phrase, “invert, always invert,” and Charlie Munger built a fortune on it. It is far easier to spot the dumb mistakes that would sink you than to design the brilliant moves that would save you, and steering clear of stupidity gets you most of the way to smart.

Nassim Taleb takes the same idea one step further. The fastest way to improve most of your life is not to add something clever but to remove something harmful, a move he calls via negativa. You do not need a better evening routine half as badly as you need to stop scrolling in bed. You rarely need a new strategy. You need to cut the obvious mistake you keep making and have been avoiding putting into words.

That is the whole toolkit: 3 habits, a few minutes apiece, and together they beat any course you could ever buy. But habits run in the background, and sometimes you need a question right now, in the moment a decision lands on you. Keep these five within reach:

• “Is this reversible?”

• “Am I doing this for my future self, or to protect my past one?”

• “What would have to be true for the opposite choice to be the right one?”

• “Will the 80-year-old version of me regret not having tried?”

• “What is the worst outcome I could actually live with?”

Nobody runs all five every time. The point is that the right one tends to surface at the right moment, once asking them has become a habit.

So you now have the theory, the profile, the filter, the mindset, the habits, and the questions. Everything you need to decide well. And yet, on an ordinary Tuesday morning, almost none of it will save you. The reason why is the most important part of this whole article.

VII – From understanding to system

But here is the catch: knowing how to decide well and actually doing it every morning, under real pressure, are two very different things, and the second one runs on a system, not on willpower.

That system is the whole subject of my next article, a single tool that scores any real decision in about 60 seconds with nothing but a chat window and the right prompt, and pulls every habit and question from this article into one move you can repeat for life.

*It goes out this weekend on my Substack, for paid subscribers only.

VIII – Summary

• Most of your life is reversible. Decide fast on the doors that swing both ways, and slowly on the ones that lock behind you.

• Sort before you solve. Every decision is reversible or not, urgent or not, and that sorting is most of the work.

• Judge the decision, not the result. A good call can still lose and a bad call can still win, because the difference between them is luck, not skill.

• Build the 4 traits. Act at 70%, know the edge of what you know, think in odds, and go looking for why you are wrong.

• Run the 3 habits. Write the decision down, imagine it has already failed, and turn the question upside down.

• Keep the 5 questions close. Above all the first and the last, can I undo this, and what is the worst I could actually live with.

That is the whole game. Not more intelligence or more nerve, just better questions asked a little earlier, on the few decisions that actually shape the rest.

Most of your life is reversible. Life itself is the one door that never opens twice, so save your best deciding for the things that truly cannot be undone.

— conduct|r

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References

Academic research

• Kahneman, D., & Tversky, A. (1979). Prospect Theory: An Analysis of Decision under Risk. Econometrica, 47(2), 263–291.

• Klein, G. (2007). Performing a Project Premortem. Harvard Business Review, 85(9), 18–19.

Books

• Bevelin, P. (2007). Seeking Wisdom: From Darwin to Munger. PCA Publications.

• Duke, A. (2018). Thinking in Bets: Making Smarter Decisions When You Don’t Have All the Facts. Portfolio.

• Kahneman, D. (2011). Thinking, Fast and Slow. Farrar, Straus and Giroux.

• Klein, G. (1998). Sources of Power: How People Make Decisions. MIT Press.

• Parrish, S. (2023). Clear Thinking: Turning Ordinary Moments into Extraordinary Results. Portfolio.

• Stone, B. (2013). The Everything Store: Jeff Bezos and the Age of Amazon. Little, Brown.

• Taleb, N. N. (2012). Antifragile: Things That Gain from Disorder. Random House.

Historical cases

• Bezos, J. (2015). Letter to Amazon Shareholders. The one-way versus two-way door distinction and the 70% rule.

• Long-Term Capital Management collapse, 1998. Hedge fund founded in 1994; roughly $4.6 billion lost in under four months.

• The founding of Amazon, 1994. Jeff and MacKenzie Bezos drive from Texas to Seattle; the regret-minimization framework, as recounted in his Academy of Achievement interview.

• Super Bowl XLIX, February 1, 2015. Pete Carroll’s goal-line pass call, intercepted by Malcolm Butler of the New England Patriots.

Quoted figures

• Warren Buffett, on the obligation to confront evidence that contradicts your beliefs.

• Charles Darwin, on his golden rule of recording disconfirming facts at once, from his autobiography.

• Carl Jacobi, “invert, always invert.”

• Charlie Munger, on the circle of competence and on inversion.

• Seneca, on premeditatio malorum, the premeditation of evils.

• Socrates, on awareness of one’s own ignorance as the beginning of wisdom.