Optimize Caffeine: No Coffee After 2 PM

The Problem

You drink coffee at 3 PM for energy and then can't fall asleep until midnight.

The Hack

Set a caffeine cutoff: no coffee, tea, or caffeinated drinks after 2 PM. If you need afternoon energy, use a walk, cold water, or power nap instead.

Why It Works

At 3 PM, 50% of that caffeine is still in your system at 9-11 PM. Even if you fall asleep, caffeine reduces deep sleep quality by 20%, meaning less restorative rest and more fatigue the next day — creating a cycle.

Pro Tips

• Half-life: 6 hours average (varies by person)
• 3 PM coffee → 50% caffeine still active at 9 PM
• Switch to herbal tea or decaf after 2 PM
• You'll sleep better within 3 days of cutting afternoon caffeine