Core principle: Great sleep is not just about bedtime. It is driven by light exposure, movement, caffeine timing, body temperature, stress load, and how consistently you cue your brain to wind down.
Circadian Rhythm Basics
- Your body clock is set mostly by light, darkness, food timing, and routine.
- Morning sunlight helps anchor wakefulness and improves melatonin timing later.
- Irregular sleep and bright late-night light shift the clock later and make sleep onset harder.
- Consistent wake time is usually the strongest anchor.
Sleep Pressure
- Sleep pressure builds while you are awake and is partly driven by adenosine.
- Long naps, sleeping in, or too much caffeine late in the day can blunt that pressure.
- If you cannot fall asleep, look first at wake time consistency and total time in bed.
Cortisol Cycle
- Cortisol should rise in the morning to help alertness, then gradually taper through the day.
- High evening stress, hard late workouts, heavy meals, or doomscrolling can keep the system “on.”
- Use evening light reduction, calming rituals, and temperature drop to signal safety and sleep.
Caffeine Cutoff Calculator
| Wake Time | First Caffeine (90 Min Delay) | Last Caffeine (6 Hr Before Bed) | Last Caffeine (10 Hr Before Bed) |
|---|
| 5:30 am | 7:00 am | 3:30 pm | 11:30 am |
| 6:00 am | 7:30 am | 4:00 pm | 12:00 pm |
| 6:30 am | 8:00 am | 4:30 pm | 12:30 pm |
| 7:00 am | 8:30 am | 5:00 pm | 1:00 pm |
| 7:30 am | 9:00 am | 5:30 pm | 1:30 pm |
| 8:00 am | 9:30 am | 6:00 pm | 2:00 pm |
| 8:30 am | 10:00 am | 6:30 pm | 2:30 pm |
| 9:00 am | 10:30 am | 7:00 pm | 3:00 pm |
Assumes a target bedtime about 16 hours after waking. Use the 10-hour cutoff if you are especially caffeine-sensitive, anxious, or troubleshooting persistent insomnia.
Fast Fixes That Improve Sleep Fastest
| Lever | What to do |
|---|
| Morning light | Get 5–15 minutes of outdoor light within the first hour after waking. |
| Movement | Walk daily and finish intense exercise at least 2–3 hours before bed when possible. |
| Temperature | Cool the bedroom and warm the body earlier with a shower, bath, or socks. |
| Light hygiene | Dim overhead lights in the last hour and reduce bright phone exposure. |
| Food timing | Finish large meals 2–3 hours before bed; limit alcohol if sleep quality matters. |
wingmanprotocol.com | Free tools + printables
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What to notice: Poor sleep often clusters around late caffeine, inconsistent wake times, alcohol, intense evening work, heavy meals, or phone use in bed. Track patterns before changing too many variables at once.
wingmanprotocol.com | Free tools + printables
60 Minutes Before Bed
| ☐ | Big rocks | My version |
|---|
| ☐ | Lower light: lamps only, overhead lights off, screens dimmed. | |
| ☐ | Stop work and mentally close open loops with a quick list for tomorrow. | |
| ☐ | Prepare the room: cool temperature, dark curtains, devices charging away from bed. | |
| ☐ | Optional shower, bath, stretching, or magnesium if already part of your routine. | |
30 Minutes Before Bed
| ☐ | Calming actions | My version |
|---|
| ☐ | Read paper book, journal, breathwork, prayer, or meditation. | |
| ☐ | Keep stimulation low: no email, arguments, problem-solving, or intense shows. | |
| ☐ | If anxious, write down worries and assign them to tomorrow’s action list. | |
10 Minutes Before Bed
| ☐ | Sleep cues | My version |
|---|
| ☐ | Brush teeth, use the bathroom, and make the room fully dark and quiet. | |
| ☐ | Take 5 slow breaths with a long exhale or do a body scan from toes to face. | |
| ☐ | Get in bed only when you are sleepy, not just exhausted and wired. | |
Bedroom Environment Audit
| Checklist | Yes | No | Notes |
|---|
| The room is dark enough that I cannot clearly see details across it. | ☐ | ☐ | |
| The room stays cool enough to sleep comfortably. | ☐ | ☐ | |
| My mattress and pillow support side/back sleeping without pain. | ☐ | ☐ | |
| Phones and bright screens are out of arm’s reach. | ☐ | ☐ | |
| Noise is controlled with fans, white noise, or earplugs if needed. | ☐ | ☐ | |
| The bedroom is associated with sleep, not work or scrolling. | ☐ | ☐ | |
wingmanprotocol.com | Free tools + printables
| Day | Wake Time | Sleep Quality | Energy 10am | Energy 2pm | Energy 5pm | Mood | What I did differently |
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Use the data: Morning energy usually improves when wake time, light exposure, hydration, movement, and caffeine timing are stable. If 2pm crashes are common, review lunch size, sleep debt, and late-night screen habits.
wingmanprotocol.com | Free tools + printables