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between the decisions and the time of day they were issued: If a hearing was held early in the day, the judge gave a favorable ruling about 65 percent of the time. But as the day went on, the likelihood of a favorable ruling steadily declined all the way to zero after a noticeable bump back up to 65 percent right after lunch. This trend was consistent across many variables, including the type of crime committed, the criminal’s education, and his or her behavior while in prison.

      So what was going on with those judges? It turns out that making all of those decisions about whether or not criminals should be granted parole was using up their decision-making budget, also known as willpower. Willpower seems like an abstract concept. Some of us have a lot of willpower and others don’t, right? Wrong! In reality, willpower is like a muscle. You can exercise it to make it stronger, and it gets fatigued when it’s worked too much. When your willpower muscle is fatigued, you start making bad decisions. And you do it without noticing.

      The idea of a “willpower muscle” is partly based on our understanding of the anterior cingulate cortex (ACC), a little C-shaped part of your brain right by your temple. Scientists believe that the ACC is the seat of willpower. Think of your ACC as maintaining an energetic bank account. When you start your day, it’s flush with energy, but every time you make a decision or exert mental effort, you withdraw a little bit of the balance. Choosing what to wear in the morning takes out a little bit. Deciding what to make for breakfast uses a little bit more. Bigger decisions, such as deciding whether or not a criminal will be granted parole or not, empty your account faster. If you overdraw your energetic bank account with trivial decisions, your ACC stops responding well and your willpower runs out. That’s when you give in to bad decisions.

      This phenomenon is called decision fatigue: the more decisions you make, the worse your judgment becomes. Corporations have known about decision fatigue for years. That’s why they put brightly packaged candy up front at store registers. As you make decision after decision while shopping, you’re depleting your energetic bank account. By the time you’re ready to check out, you’re more likely to be experiencing decision fatigue—and a craving for a quick hit of sugar to give your brain more energy—so you give in and buy a candy bar.

      Judges are not immune to this phenomenon; they use up a lot of willpower throughout the day hearing cases. At the end of the day, when the energy balance in their ACC is running low, it becomes easier to deny parole than to try to negotiate a more complicated decision. This also helps explain why the judges in the study granted more paroles right after lunch than at other times in the afternoon; their ACCs had just received a hit of energy.

      One wonders whether the type of lunch they ate was an important variable. It only makes sense that a lunch designed to deliver sustained energy would lead to better decisions. Silicon Valley lore says that many years ago, the once dominant computer company Sun Microsystems banned pasta from the lunch menu used for on-site meetings because its executives noticed that meetings tended to tank after high-carb lunches. The reality is that what you eat does impact your willpower—though it is easier to stop making meaningless decisions than it is to change what you eat (I do both).

      The good news is, now that you know about decision fatigue, you can be sure to schedule all of your parole hearings for the morning. Even better, you can free up more willpower to start making better decisions so that you don’t end up being convicted of a crime in the first place! You can do this in two ways: by building up the amount of energy stored in your ACC and by reducing the number of decisions you make throughout the day to preserve your mental energy.

      You can build your “willpower muscle” the same way you strengthen any muscle in your body: by doing hard things you don’t want to do. A simple trick I use is to keep a heavy-duty spring-loaded hand-grip trainer on my desk. When I think about it, I squeeze it until it burns and my arm tells me to stop and then keep squeezing. Another technique I use is to hold my breath until my lungs scream at me to breathe and then hold it longer. When you successfully do the things you don’t want to do, everything else seems easier by comparison. Your willpower grows. But consider not pushing your willpower on a day when you have other major decisions to make. On those days, don’t burn out your willpower reserves before a crucial meeting or presentation.

      Some game changers find that simply eliminating as many decisions as possible offers them more mental clarity. Every time you avoid making a choice, you save a little bit of willpower that you can then put toward something that will have a greater impact. Many high performers have developed day-to-day routines that are so dialed in that they don’t even think about them. These people simply show up and execute with extreme focus and energy.

      Experiment with tracking your decisions for a few days, and then start automating the ones that are a waste of energy. Meal and wardrobe decisions are two common ones that high performers tend to automate. Why do you think Steve Jobs wore a black turtleneck and New Balance sneakers every day, Mark Zuckerberg has ten identical T-shirts in his closet, or most corporate CEOs cycle through three or four suits every week (and I’m usually wearing one of several Bulletproof T-shirts and ugly but massively comfortable toe shoes when you see me online)? When you reach for some version of the same outfit every day, you never have to worry about what to wear. This may seem like a minor decision, but it saves a lot of mental energy that you can then use for something more meaningful.

      Admittedly, this is usually easier for men than women, but either gender can opt for a “capsule” wardrobe if you’re not ready to go full Steve Jobs. To do this, pick three or four tops, bottoms, jackets, and shoes, all in neutral colors such as gray and navy. Plan so that everything in your closet matches, to the point where you can get dressed in the dark and still look good. Then get rid of all your other clothes so that you have only twenty or so items in your closet. You can find capsule wardrobe guides online for inspiration. Some popular clothing brands now even tag “capsule” pieces in their catalogues. There’s nothing wrong with saving a few special pieces for social events and formal occasions. The point is to avoid having to make daily decisions about what to wear when no one will notice whether your outfit is awesome or not.

      You can also create a sort of “capsule diet” by cycling through the same few meals. To do this successfully, find five or six different tasty recipes you can cook that your whole family likes. Then you can buy groceries and cook on autopilot without having to make lots of decisions about what to buy and cook each week. When you get tired of one of the meals, swap it out for a new one. One of my most impactful willpower hacks has actually been none other than Bulletproof Coffee. I don’t ever have to think about what I’m having for breakfast, and I save the time I would have otherwise spent preparing a meal. You can do the same thing with whatever breakfast gives you the most energy with the fewest decisions and the least amount of work.

      When you use these techniques to cut down on decision making, you free up a tremendous amount of mental energy that you can use however you like. I recommend devoting it to your most meaningful life work. Not sure what that is yet? Here’s a hint: you decide.

      Action Items

       Take a deep breath. Now hold it until you’re sure you have to breathe. Hold it for eight more seconds. (Don’t do this if you’re driving or have health problems.)

       Take note—mentally or on paper—every time you make a decision for a week. As you notice yourself making a decision, ask yourself two questions:Did this decision matter?Was there a way to avoid making this decision by ignoring it, automating it, or asking someone else who loves making that kind of decision to make it instead?

       Start now. Name two decisions you make every day that add absolutely no value to your life. Write them down here so you don’t have to decide to do it later.Useless daily decision 1:________________________________________________________Useless daily decision 2:________________________________________________________

       Now stop making them.

       Take a look at your breakfast. Can you automate that decision? What’s your new “no-thought” default breakfast going to be? Try it for a week.

       Go through your closet and put the most compatible stuff in the front so you can spend a few days making fewer decisions about getting

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