How to Identify What’s Sabotaging Your Performance (And Fix It)

You can’t optimize what you can’t see.

Most leaders are operating with multiple forms of cognitive kryptonite—factors that silently destroy focus, decision-making, and emotional regulation—without realizing it.

Here’s how to systematically identify what’s undermining your performance and eliminate it.

Step 1: Track Your Cognitive Performance Patterns

Before you can fix what’s broken, you need to know when and how your performance degrades.

The 7-day cognitive audit:

For one week, rate yourself 1-10 on these metrics at 9 AM, 2 PM, and 7 PM:

Mental clarity (can you think strategically or is everything foggy?)
Focus capacity (can you sustain attention or are you scattered?)
Emotional regulation (are you calm and responsive or reactive and irritable?)
Energy level (sustainable or running on fumes?)
Decision quality (confident and clear or second-guessing everything?)

Also track:

Hours of sleep the night before
What you ate and when
Stress level (1-10)
Any physical symptoms (headache, tension, digestive issues)

Patterns will emerge. You’ll notice your cognition tanks after certain meals, or every afternoon at 3 PM, or on days when you sleep less than 6 hours.

This isn’t about perfection. It’s about visibility. You can’t address what you can’t see.

Step 2: Eliminate the Sleep Debt

If you’re sleeping less than 7 hours consistently, stop here. Nothing else matters until you fix this.

Sleep deprivation destroys:

Memory consolidation
Emotional regulation
Decision-making capacity
Immune function
Metabolic health

The protocol:

Set a non-negotiable bedtime. Work backward from when you need to wake up. Need to be up at 6 AM? In bed by 10 PM. No exceptions.

Create a shutdown ritual. 30 minutes before bed: dim lights, no screens, no work conversations. Read, stretch, breathe.

Optimize your environment. Dark room (blackout curtains or eye mask). Cool temperature (65-68°F). No phone in bedroom.

Track it. Use a wearable or just note how you slept. After two weeks of 7-8 hours, assess: Did your cognitive performance improve?

If not, you may have sleep quality issues (sleep apnea, poor sleep architecture). See a sleep specialist.

But start here. Sleep is non-negotiable cognitive infrastructure.

Step 3: Stabilize Your Blood Sugar

Brain fog, afternoon crashes, irritability, difficulty focusing—these are often blood sugar issues, not character flaws.

Your brain runs on glucose. When your blood sugar spikes and crashes, your cognition follows.

The fix:

Eat protein and fat with every meal. Not just carbs. A breakfast of toast and coffee will crater you by 10 AM. Eggs, avocado, and vegetables will sustain you.

Reduce processed carbs and sugar. Muffins, bagels, pasta, bread—these spike glucose fast and crash hard. Replace with vegetables, healthy fats, quality protein.

Don’t skip meals. Going 6+ hours without food while demanding high cognitive performance is a recipe for poor decisions and emotional reactivity.

Test it: Eat a high-protein, high-fat breakfast tomorrow. Notice your focus at 11 AM. Compare that to your typical carb-heavy breakfast. The difference will be obvious.

Step 4: Address Chronic Stress (The Prefrontal Cortex Killer)

Chronic stress literally shuts down the part of your brain responsible for strategic thinking, emotional regulation, and good judgment.

You cannot think your way out of a dysregulated nervous system.

The practice:

Build a daily reset ritual. 5-10 minutes where you deliberately shift out of fight-or-flight:

Breathe slowly: 5 seconds in, 5 seconds out, for 2 minutes
Drop attention into your body. Notice tension. Soften it.
Recall something you’re genuinely grateful for. Feel it.

Do this 2-3 times daily. Before difficult meetings. Mid-afternoon when stress peaks. Before bed.

This isn’t “relaxation.” It’s nervous system regulation. It brings your prefrontal cortex back online.

Step 5: Identify Your Food Sensitivities

You might be eating “healthy” foods that are creating inflammation and brain fog.

Common culprits: gluten, dairy, eggs, soy, corn, nightshades.

The elimination protocol:

Remove the top inflammatory foods for 3 weeks:

Gluten (wheat, barley, rye)
Dairy
Sugar
Processed foods

Track your cognitive performance daily using the audit from Step 1.

After 3 weeks, reintroduce one food at a time. Wait 3 days between reintroductions. Notice:

Brain fog?
Energy crash?
Mood shift?
Digestive issues?

If a food triggers symptoms, eliminate it. Your body is telling you it’s creating inflammation.

This isn’t about being “clean.” It’s about identifying what impairs your brain.

Step 6: Check Your Hormones

If you’ve addressed sleep, nutrition, and stress and still struggle with focus, motivation, or emotional regulation—get your hormones tested.

At minimum, test:

Thyroid panel (TSH, Free T3, Free T4, Reverse T3, thyroid antibodies)
Sex hormones (testosterone, estrogen, progesterone)
Cortisol (ideally a 4-point saliva test)
Vitamin D
B12, folate, magnesium

Work with a functional medicine practitioner who optimizes for performance, not just “within range.”

Low-normal testosterone in men? You’ll struggle with motivation and focus. Hypothyroid? Brain fog and fatigue are guaranteed. Vitamin D deficiency? Mood and cognition suffer.

You can’t willpower your way through hormonal dysfunction.

Step 7: Audit Your Environment

Your environment either supports focus or fragments it.

The assessment:

Workspace:

Is your desk cluttered or clean?
Are you interrupted constantly or do you have focus blocks?
Is the lighting harsh fluorescent or natural?
Is the air quality good or stuffy?

Digital environment:

How many notifications hit you hourly?
Do you check email reactively or in batches?
Are you context-switching constantly or protecting deep work time?

Physical environment:

Mold exposure? (This destroys cognition.)
Air quality poor?
Allergens triggering inflammation?

Fix what you can control:

Batch notifications. Turn them off during focus blocks.
Create a clean, organized workspace.
Use air filters if needed.
Protect 2-hour blocks for deep work with no interruptions.

Small changes compound. An optimized environment removes friction from focus.

Step 8: Train Your Attention

If you’ve never trained your attention deliberately, your focus capacity is untapped.

The practice:

Daily focus training: Set a timer for 25 minutes. Work on one task with zero distractions. No phone. No email. Just the task.

When your mind wanders (it will), gently return to the task.

Do this once daily for 2 weeks. Then twice daily.

Your attention is a muscle. If you’ve been context-switching for years, it’s atrophied. Training rebuilds it.

What This Creates

When you systematically identify and eliminate cognitive kryptonite:

Decisions become clearer because your prefrontal cortex is actually online
Focus becomes sustainable because your biology supports it
Emotional regulation improves because you’re not operating from chronic stress
Energy stabilizes because you’re fueling your brain properly
Performance improves—not from trying harder, but from removing barriers

You’re not broken. You’re operating with biological dysfunction.

Fix the biology. Everything else gets easier.

Ready to identify and eliminate what’s undermining your performance? Schedule a strategy session to explore whether Become the 1% training can help you optimize your cognitive infrastructure.