Sleep Hygiene: What to Actually Do

Almost every patient who walks into clinic with brain fog, slowed processing, irritability, or stalled recovery is sleeping badly. Sleep is where the brain consolidates memory, regulates mood, and clears metabolic waste. It is not a lifestyle accessory. It is treatment.

The phrase "sleep hygiene" has been diluted into a list of vague suggestions. What follows is the version our clinicians actually use with patients: specific, ordered, and built around the two systems that govern sleep, your circadian clock and your sleep pressure.

1. Fix the timing before anything else

Wake at the same time every day, including weekends, within about thirty minutes. A fixed wake time anchors the entire circadian system, and it is more powerful than a fixed bedtime because you can control it. Let bedtime follow naturally from when you are genuinely sleepy.

Get outdoor light within an hour of waking, ten to twenty minutes on a bright morning and longer on an overcast one. Outdoor light is many times stronger than indoor light even under clouds, and it sets the timer that releases melatonin roughly fourteen to sixteen hours later.

2. Protect the last three hours

Keep caffeine to the morning; its half-life means an afternoon coffee is still measurably in your system at bedtime. Finish alcohol early or skip it. Alcohol shortens sleep latency and then fragments the second half of the night, suppressing REM precisely when the brain needs it.

Eat your last substantial meal two to three hours before bed. Dim the household lights in the evening rather than sitting under full overheads until the moment you lie down.

3. Make the room boring

Cool, roughly 65 to 68 degrees. Dark enough that you cannot see your hand. Quiet, or with steady white noise if your environment is not. Keep the bed for sleep and intimacy only, so your nervous system stops associating it with work, scrolling, and worry.

4. What to do when you wake at 3 a.m.

Do not lie there negotiating. If you have been awake roughly twenty minutes, get up, go to another room, keep the lights low, and do something quiet and dull until you feel sleepy again. Reading on paper is ideal. Returning to bed only when sleepy is the core mechanic of cognitive behavioral therapy for insomnia, the first-line treatment for chronic insomnia and more durable than any sleep medication.

Turn the clock away from you. Watching the hour advance converts a normal awakening into an anxiety loop.

5. Naps, weekends, and the recovery myth

A nap of twenty to thirty minutes before mid-afternoon is fine and often helpful, particularly after a concussion. Longer or later naps eat into the sleep pressure you need that night. Sleeping in for hours on Saturday shifts your clock westward and produces a Sunday night you will not enjoy.

6. When hygiene is not the problem

Signs that warrant evaluation

Loud snoring, witnessed pauses in breathing, morning headaches, or unrefreshing sleep despite adequate hours can indicate obstructive sleep apnea, which is markedly more common after brain injury and is a modifiable risk factor for cognitive decline. Acting out dreams, restless legs, or persistent insomnia beyond three months also deserve a clinical evaluation rather than another app.

Our clinicians treat sleep as a core pillar of recovery, prevention, and optimization, and we assess it directly rather than assuming a patient simply needs better habits. If you have done everything on this list and sleep is still broken, that is clinical information, not a personal failing.