Choosing Sleep Cycle Counts for Shift Workers
Shift work disrupts your natural rhythm. Learn how to use 90-minute sleep blocks to maintain alertness and health, whether you're working early mornings, evenings, or overnight.
Read Guide →Guide Library
Sleep Guides
Understanding the mechanics of sleep is the first step to mastering it. Our guides break down complex topics into actionable advice.
Most of us think of sleep as a single block of time, but it's actually a dynamic process. Your brain cycles through distinct stages—light sleep, deep sleep, and REM—every 90 minutes. Waking up at the wrong moment can leave you groggy, even if you've slept for 8 hours. These guides help you navigate those cycles.
Featured Guides
Deep, practical walk-throughs to help you plan sleep around real life.
Reduce Sleep Latency: Fall Asleep Faster
Staring at the ceiling? Sleep latency is the time it takes to transition from wakefulness to sleep. Discover evidence-based tactics to shorten this time without medication.
Read Guide →The Ultimate Sleep Hygiene Checklist
Your environment dictates your sleep quality. Use this 10-point checklist to audit your bedroom, evening habits, and daily routine for optimal rest.
Read Guide →Quick Sleep Tips
Small changes that yield big results.
- The 10-3-2-1 Rule: No caffeine 10 hours before bed, no food 3 hours before, no work 2 hours before, and no screens 1 hour before.
- Napping: Keep naps to 20 minutes (power nap) or 90 minutes (full cycle). Anything in between risks sleep inertia.
- Consistency is King: Your circadian rhythm thrives on regularity. Try to keep your wake-up time within a 30-minute window, even on weekends.
Use the calculator with the guides
The tool gives you timing options. The guides tell you which option fits the night.
Need a decision fast?
Open the calculator, choose the wake time you cannot miss, then use the quick guide summaries to decide between four, five, or six cycles.
Open calculatorTrying to fix the whole routine?
Start with the sleep hygiene checklist and latency guide, then return to the calculator after a week of steadier evenings.
Start with the checklist