Dealing with Decision Fatigue
It sneaks up on you. Morning starts fine—eggs or toast, whatever, quick decision. Then your inbox has 47 messages and you spend ten minutes figuring out which one to open first. The meeting request or the “quick question” that’s never actually quick? By lunch your brain feels like it’s wrapped in cotton wool. By 7 PM you’re standing in front of the open fridge, just looking. You’re not really hungry. You’re not really anything. Just… depleted.
Autopilot kicks in. Sandwich again. Same coffee order. The route home you could drive blindfolded. When your partner says “what should we have for dinner?” you feel this flash of something—irritation? exhaustion?—and you don’t even know why. It’s just dinner. But it’s also the 200th decision today. That book on your nightstand? The one your friend said was life-changing? Been sitting there since January. You know you should read it. But turning pages requires choosing words, engaging your brain, and right now your brain has checked out for the night.
Here’s what’s strange about this: almost none of these choices matter. Like, at all. Eggs versus cereal? Who cares. But—and this is the frustrating part—your brain treats every decision the same way. Breakfast choice and career choice use the same mental equipment. By evening you’ve burned through your quota on things that don’t count, and the things that do? You’re too tired to think straight about them.
Turns out there’s a name for this. Decision fatigue. Researchers have been studying it for decades. And nearly everyone I’ve talked to about it has that same look of recognition—oh, THAT’S what’s happening.
What I keep thinking about is this: ancient philosophers obviously didn’t have our problems. No notifications, no streaming, no infinite scroll. But when you actually read what they wrote—Seneca, Marcus Aurelius, the Taoists—they understood. They knew the mind gets tired. That clarity is limited. That you can use it up on nonsense and have nothing left for what matters.
They came up with practices. Not to help them decide faster or better—to help them decide less. Protect their thinking for the things that counted. What’s weird is how well it still applies. Maybe even more now, given how many choices we face daily.
You’re not the first to carry this
Voices Across Time
I want to share four voices here. Different times, different places, different approaches to pretty much everything. Lao Tzu, who deliberately wrote in paradoxes. Seneca, juggling letters to friends and advice to emperors. Marcus Aurelius, who ran the Roman Empire by day and journaled by candlelight at night. The Buddha, who walked away from literal royalty. Different as they were, they each understood something about mental overload. And they each found their own way through it.
“In the pursuit of learning, every day something is acquired. In the pursuit of Tao, every day something is dropped. Less and less is done until non-action is achieved.”
Lao Tzu — Tao Te Ching
Reading Lao Tzu, the theme that keeps coming up is subtraction. Not “add this morning routine” or “try this new app”—just… take stuff away. We keep piling on choices, commitments, obligations, when honestly half of them could disappear and we’d be better off. His concept of “non-action” sounds lazy but isn’t. It’s realizing that some decisions simply don’t need to be made. Some situations resolve themselves if you stop meddling. Counterintuitive, but I’ve seen it work.
“It is not that we have a short time to live, but that we waste a lot of it. Life is long enough if it is well spent, but when it is wasted in heedless luxury and passed in doing nothing, we realize it has passed us by.”
Seneca — Roman philosopher, 4 BCE – 65 CE
On the Shortness of Life
Seneca lived among Rome’s wealthiest citizens and watched them exhaust themselves over the dumbest stuff. Who got invited where. What everyone was wearing. Social climbing nobody would remember in a generation. Meanwhile actual important things—health, relationships, inner peace—got ignored. His point still hits: we’re not low on time or energy. We’re wasting both on things that genuinely don’t matter. Try asking “should I care about this at all?” before “which option do I pick?” Usually the answer is no.
“If you seek tranquility, do less. Or more accurately, do what is essential—what the logos of a social being requires, and in the manner required. This brings a double satisfaction: to do less, better.”
Marcus Aurelius — Meditations
Marcus Aurelius ran the Roman Empire. That was his day job. Plagues, multiple wars, family members plotting against him—he dealt with all of it. Not as theory but as actual daily problems landing on his desk. If anyone knew overwhelm, he did. And his approach? Not some clever system. Just… doing less. Cutting out what didn’t matter so there was room for what did. His private journal is basically notes to himself: every commitment costs something. Don’t waste those costs.
The Buddha noticed something about how minds work: we don’t just make decisions once. We make them over and over. That awkward thing you said at the party keeps replaying. The meeting next week has already gone wrong in your head a dozen different ways. All that mental rehearsal is draining. His teaching sounds too simple to work: come back to now. Right here. The future hasn’t happened. The past is done. Only this moment is actually asking anything of you.
“Do not dwell in the past, do not dream of the future, concentrate the mind on the present moment. The mind is everything. What you think you become.”
Buddha — Spiritual teacher, 5th century BCE
Buddhist teachings
What connects them
What They All Understood
Different people, different centuries, same basic insight: mental energy is limited. More limited than we think. And nobody else can see when yours is running low—you have to notice and protect it yourself. None of these thinkers dealt with smartphones or social media. But they grasped something we keep missing: more choices don’t equal a better life. Having fewer decisions to make does.
In practical terms: simplify wherever you can. Same breakfast every morning saves a decision. Default outfit for work. Standing order at the coffee shop. Remove choices that don’t need to be choices. Say no more often—to invitations, to “opportunities,” to all the things competing for your attention. When you catch yourself obsessing over something that won’t matter next week, try to let it go. Your clear thinking is in short supply. Spend it on things that count.
Clearer thinking tomorrow starts with choices you make today. Set boundaries. Drop commitments that aren’t serving you. Protect your time. None of this is exciting. But it works.
Science confirms
What Science Now Confirms
What Lao Tzu, Seneca, and Marcus Aurelius understood centuries ago, research now confirms. According to Deloitte’s 2025 Workforce Intelligence Report, mental fatigue and decision friction have become the leading indicators of burnout—surpassing workload volume for the first time. Studies show the average person makes over 35,000 decisions daily, and research published in JAMA Network Open found that physicians make worse decisions later in their shifts due to decision fatigue. The solution isn’t more willpower—it’s fewer decisions. Companies that help employees manage decision load outperform their peers by 22%, according to McKinsey.
Sources: Deloitte (2025), McKinsey (2024)
Before you go
A Moment for You
Here’s what I’ve come to believe: you don’t need to get every decision right. That’s not realistic and it’s not the point. The point is figuring out which decisions are worth caring about at all. Most aren’t.
Tonight, try something small. Lay out tomorrow’s clothes. Know what you’re having for lunch. Take those decisions off your plate before they even come up. Save your mental bandwidth for choices that actually matter. And on the days when you hit empty anyway—when even small decisions feel like mountains—be gentle with yourself. Nothing’s broken. You’re just human. Everyone runs out sometimes.
If you’d like personalized guidance on managing mental energy and reducing decision overwhelm, InnerCalm+ can help.
This post is also available in:
