THE PRACTICAL TAKEAWAY
Make a brief morning record of the night and relevant daytime habits. Look for patterns, avoid chasing precision, and bring persistent problems to a clinician.
In this article
“I sleep badly” is a real concern, but it can be difficult to explain during an appointment. Do you struggle to fall asleep, wake repeatedly, wake too early, or have too little time in bed? A sleep diary helps separate those questions.
You can use a sheet of paper or a plain note. NHLBI suggests a diary for one to two weeks before an insomnia assessment and provides a printable version. A wearable is optional. NHLBI: sleep diaries and insomnia assessment NHLBI: a printable sleep diary
Fill it in after getting up
Write estimates while the night is reasonably fresh. You do not need to check the clock every time you wake. If you are unsure, use “about” or leave a field uncertain rather than inventing an exact minute.
Keep the record somewhere easy to find. A brief entry that you complete is more useful than a detailed template you abandon after two nights.
A simple template with an example
| Record | Example |
|---|---|
| Date and sleep schedule | Tuesday night; bed 10:45 p.m.; tried to sleep around 11 |
| Estimated time to fall asleep | About half an hour |
| Waking during the night | Twice; one brief, one perhaps 20 minutes |
| Final waking and getting up | Awake 6:30 a.m.; out of bed 6:45 |
| Daytime habits | Short afternoon nap; last coffee 3 p.m.; evening walk |
| Other context | No alcohol; usual medicines; noisy street |
| Next-day feeling | Sleepy during a late-morning meeting |
NHLBI recommends including sleep and wake times, naps, daytime sleepiness, caffeine, alcohol, and exercise. The example adds room for practical context. Record medicine changes accurately, but do not make changes simply to test their effect. NHLBI: sleep diaries and insomnia assessment
Review one question at a time
After several nights, first ask whether the schedule leaves enough opportunity for sleep. Then look at the concern you started with: is the main problem falling asleep, long awakenings, an early alarm, or daytime sleepiness despite enough time in bed?
Compare ordinary workdays with days off. Mark unusual nights involving travel, illness, or a late event. Those nights matter, but they may not describe your usual pattern.
A pattern is a clue, not proof
If late coffee and difficult nights occur together, that suggests a question worth exploring. It does not prove caffeine is the only cause. If you decide to try an earlier last coffee, keep other routines reasonably steady so the change is easier to interpret.
Do not convert the diary into a nightly grade. A difficult night is an observation, not a failure. Avoid restricting your time in bed using an internet formula; formal sleep treatment may require individualized guidance.
Bring a short summary to the appointment
Take the diary and a sentence such as: “For several weeks I have been awake for a long stretch most nights, and I am sleepy at work.” Mention loud snoring, observed breathing pauses, or waking gasping. Those details may change the assessment. NHLBI: sleep diaries and insomnia assessment
Get help promptly if sleepiness makes driving or other activities unsafe; do not drive drowsy. If tracking itself increases worry, keep it shorter and ask your clinician how much detail would help.
The useful outcome is a clearer account of your sleep and one sensible next step. When that is achieved, the diary does not have to become a permanent daily task.
Sources & further reading
Sources checked September 8, 2026. Sample routines are editorial examples; they are not the exact protocols tested in the cited studies.
General education, not individual medical advice. Adapt activity, heat exposure, and nutrition to your health history and any clinical guidance.