Your brain is not broken – it’s over-deciding
Have you noticed how tired you feel often, even on days when you haven’t done anything particularly physical?
It’s not just workload. It’s decisions.
From the moment we wake up, we are deciding. What to prioritise. What to respond to. What to ignore. What tone to use. What to post. What to say. What not to say. Whether to push. Whether to pause.
Individually, these seem small. Collectively, they are cognitively expensive.
Welcome to decision fatigue. It is real!
If you’ve ever had too many browser tabs open on your laptop, you know that individually they are harmless, but collectively the system begins to lag. Processing slows. The fan gets louder. Eventually something freezes.
Your brain works in a similar way. Every open decision – every unresolved conversation, every pending email, every “I’ll get to that later” – is like an open cognitive tab. Even when you are not actively working on it, it consumes background processing power.
Neuroscientists call this cognitive load. And when too many tabs remain open, performance drops.
Let’s explore what we need to know and the Key Steps you can take to…
‘be the difference that makes the difference.’
- Understand what is happening in your brain.
Our prefrontal cortex – the part of the brain responsible for reasoning, planning, impulse control and complex decision-making – is metabolically demanding. It uses significant glucose and oxygen to function optimally.
Every decision draws from the same limited neural resources.
When those resources are depleted, three things tend to happen:
- We avoid decisions.
- We default to the easiest option.
- We become reactive rather than reflective.
Neuroscience shows that as cognitive load increases, activity in the prefrontal cortex decreases and the brain begins to rely more heavily on the limbic system – the emotional, threat-sensitive part of the brain.
This is why, later in the day, we:
- Snap more quickly.
- Crave sugar or comfort.
- Procrastinate on important work.
- Say “yes” when we mean “no”.
- Or feel completely overwhelmed by simple choices.
It’s not a character flaw. It’s cognitive depletion. And in a world of constant connectivity, micro-decisions have multiplied exponentially. Emails. Notifications. News. Messages. Platform switching. Context switching.
The reality… Your brain was not designed for this volume of choice.
- Know the hidden cost.
Decision fatigue doesn’t just make us tired. It reduces the quality of our leadership, our relationships and our self-regulation. When depleted, we lose access to:
- Strategic thinking
- Emotional intelligence
- Patience
- Creativity
- Wise discernment
And yet many high performers try to push through. More effort. More hours. More forcing. More multitasking.
But neuroscience tells us something different. Rest restores the prefrontal cortex. Healthy structure and habits protect its bandwidth. And clarity reduces unnecessary cognitive load.
- Reclaim your cognitive energy and take Key Steps to optimise your performance.
Here are practical, neuroscience-informed ways to reduce decision fatigue and reclaim cognitive energy:
3.1. Reduce low-value decisions.
Automate what you can. This is where the appropriate use of AI can be game changing.
Create routines for mornings, meals, exercise and admin blocks. The brain loves predictable patterns because they reduce energy expenditure. Every decision you eliminate preserves fuel for what truly matters.
3.2. Decide when you are fresh.
Make high-stakes or complex decisions early in your cognitive day. Protect your first 90 minutes where possible. This is when your prefrontal cortex is most resourced. If, like me, your energy is not at its best in the morning, then protect the time where you know you are at your best.
3.3. Create decision criteria in advance.
Instead of rethinking from scratch each time, define your decision filters:
- Does this align with my priorities?
- Does this serve the bigger vision?
- Is this mine to solve?
Pre-decided criteria reduce emotional hijacking and cognitive drain.
3.4. Build micro recovery into your day.
The brain resets through short, intentional pauses. I’d be useless without mine. You can try these…
- Two minutes of deep breathing.
- A short walk without your phone.
- Looking at greenery.
- Closing your eyes and lengthening your exhale.
These are not indulgences. They are neural recalibrations.
3.5. Practise strategic “not now” and simplify your yes or no decision.
Not every decision requires immediate action. Creating space between stimulus and response restores executive control. Delay is not avoidance – it is often wisdom.
Remember that decision fatigue increases when you overcommit. Before saying yes, ask:
- What will this cost me cognitively?
- What will this replace?
Disciplined boundaries protect mental clarity.
What Key Steps are you taking this week to be mentally sharp. It is up to you to reduce decision fatigue and preserve your mental energy so you can…
‘be the difference that makes the difference.’
