Decision Fatigue: How I Stopped Wasting My Brain on Stupid Choices

Every single day, we get hit with a barrage of decisions. One study estimates we make about 35,000 of them daily. Most are automatic, and your brain handles them on autopilot. Others demand your full attention and can genuinely change the direction of your life.

But the real problem, at least in my experience, sits right in the messy middle: decisions that are not automatic enough for your subconscious to handle, but not important enough to matter in the grand scheme of things.

That is where decision fatigue comes in. The idea is simple: the more decisions you make, the worse their quality becomes. Your brain gets tired, just like your muscles do after a workout.

A classic study looked at more than 1,100 judicial rulings and found that judges were far more likely to grant parole at the beginning of the day or right after a break. As the day dragged on, those odds dropped dramatically. These are highly trained professionals making life-altering calls, and even they were not immune.

And honestly, that makes perfect sense. Picture a brutal workday where everything comes at you at once. By late afternoon, your decisions are noticeably sloppier than they were at 9 a.m.

It is a lot like running a marathon. The first few kilometres feel effortless. The last 200 meters feel like pure suffering. The same thing happens mentally. If a truly important decision lands at the end of an exhausting day, there is a good chance decision fatigue will make you worse at handling it. Research has linked that kind of mental depletion to weaker cognitive performance and lower self-control. Not exactly a recipe for success.

So what do I actually do about it?

When life throws everything at you at once, there is no magic escape hatch. But there is one lever you can still pull: deliberately reduce the number of decisions you have to make.

I am a systems guy at heart. Give me a clear goal, and I will find the smallest next step, then repeat it until I get there. Decisions work the same way. If I can build a system that removes even one or two choices from my day, I will do it immediately.

Take my work shirts. They are almost all black or dark gray, plain short-sleeve, and basically identical. When I travel to the office, I just grab the stack, pack it, and wear the next clean one each day. At home, where I do most of my work, I bought a pack of cheap black t-shirts from Costco. They are ugly enough that I would never wear them to the office, but perfect for working from home. Every morning, I just grab the one on top of the pile.

Pants? I own exactly two pairs. I wear one, then switch when my wife does laundry.

My morning routine is basically choreographed. The coffee is prepped the night before, so in the morning I just hit the switch. My books are already chosen, with passages marked. The whole sequence from waking up to starting work is the same every day. I have even written before about how I start my workday with the same one-hour communication triage.

Meal planning used to be another easy win. Life is easier now, but when it mattered more, I would sit down on Sunday and map out the whole week. That removed the daily “what’s for lunch?” question completely.

And no, this is not about turning into a robot.

The goal is not to squeeze all spontaneity out of life. It is to clear mental space for what actually matters. If I can offload the cognitive burden of trivial stuff, like which shirt to wear or what to eat, then I have more fuel left in the tank for decisions that actually count.

That is why these simple systems feel like a hidden superpower. They do not solve every problem, but they stop you from wasting energy on stupid choices that never should have demanded your attention in the first place.

If you end most days with a fried brain because you have made too many decisions, try this. Cut what you can. Automate the trivial. Standardize the unimportant. Save your best thinking for what is actually worth it.

Decision fatigue is real. But with a bit of planning, you can stop burning mental energy on nonsense and keep it for the moments that matter.