This exercise uses two fictional sleep-diary entries to practise organizing information and checking an AI summary. Keep personal sleep notes private and take them directly to your clinician. A chat or wearable score cannot determine the cause of a sleep problem.
Start with a simple diary and the tools you already have. The goal is a clearer picture of your nights and days, without making sleep another performance contest.
What you will practise
Result: A checked summary of two fictional nights with missing information kept visible.
- Level: Beginner text practice.
- Time: About 10 minutes; an estimate, not a measured reader result.
- Device: Phone, tablet or computer; paper also works.
- Tools and cost: Work through the example free on this page. An existing AI text chat is optional; no upload, new account or paid feature is needed.
Go to the fictional practice. Use only the invented notes supplied here.
1. Keep a short sleep diary
The National Heart, Lung, and Blood Institute suggests keeping a sleep diary for one to two weeks before a sleep appointment. Record bedtime and waking, naps, daytime sleepiness, exercise, and the timing of caffeine or alcohol.
Use a notebook or a private note on your device. Add approximate time to fall asleep and any awakenings you remember. Mark estimates as estimates; leave unknown details blank.
Here is a fictional entry showing the level of detail you might use:
Tuesday: Lights out at 11 p.m. Took about 30 minutes to fall asleep. Remember waking twice. Got up at 7 a.m. Felt sleepy in the afternoon, 3 out of 5 on my own scale. Last coffee at 4 p.m. No tracker data.
Your sleepiness rating is a personal observation, not a medical test. Use the same description each day so your notes remain understandable.
2. Keep wearable data separate from your observations
If you already use a tracker, you can add its reported sleep duration alongside your diary. Label which numbers came from the device. Time in bed, estimated time asleep, and how rested you feel are different pieces of information.
Check the manufacturer’s instructions before interpreting a gap in the record. For example, Apple’s sleep-tracking guidance explains the need to enable tracking, wear the watch, keep it charged, and check its fit. A missing recording does not mean you slept for zero hours.
Treat sleep-stage charts as estimates. Avoid comparing scores from different products as if they were the same measurement, or changing treatment to improve a score. Our guide to sleep apnea and AI sleep data explains why an encouraging device result should not override symptoms.
3. Ask AI to summarize, then check its work
Separate a diary observation from a device estimate
Try the task on paper, or select and copy the entire prompt into an AI text chat you already use. Do not add personal records.
Use only these fictional entries. Summarize each night under Diary observations, Device estimate and Missing information. Calculate time in bed from bedtime to getting up the next morning, but do not call it time asleep. Do not average device values when one is missing. Do not infer a cause, diagnose a condition or suggest treatment. End with one question about the missing records.
N1, Monday night: Went to bed at 10:30 p.m.; got up Tuesday at 6:30 a.m. Time to fall asleep and time awake overnight were not recorded. The tracker estimated 6 hours 10 minutes asleep.
N2, Tuesday night: Went to bed at 11 p.m.; got up Wednesday at 7 a.m. Time to fall asleep and time awake overnight were not recorded. No tracker result was available.
Help selecting, copying and pasting.
Illustrative result — not a recorded AI response
- N1 diary: 10:30 p.m. to 6:30 a.m. the next day gives eight hours in bed. This does not establish eight hours asleep.
- N1 device: the tracker estimated six hours ten minutes asleep; that is a separate source.
- N2 diary: 11 p.m. to 7 a.m. the next day also gives eight hours in bed.
- N2 device: no result is available. Do not replace the missing result with zero or calculate a two-night device average.
- Missing for both: time to fall asleep and time awake overnight were not recorded.
Question: Which missing observations should I record before comparing the diary with the tracker?
Three checks
- Both overnight intervals are eight hours in bed, not eight hours asleep.
- The N1 tracker estimate stays separate, and N2 stays missing rather than becoming zero.
- No diagnosis, cause, treatment change or two-night tracker average is invented.
Repair request if needed: “Relabel the calculated intervals as time in bed. Keep the tracker estimate separate and leave the second tracker value missing. Remove diagnoses, treatment advice and any two-night device average.”
Explain the key check: Why can two eight-hour periods in bed still leave actual sleep duration unknown?
Finish when: the answer passes all three checks and you can explain the distinction above. A correct exercise answer is not a medical finding.
4. Use the notes to organize a manageable routine
You can ask AI to turn habits you have chosen into a short evening checklist. The NHLBI’s sleep guidance includes a quiet, dark, comfortable bedroom, a regular sleep schedule, and a routine that helps you wind down.
Keep the checklist small enough to use. For instance: prepare tomorrow’s essentials, reduce distractions, and begin a relaxing activity. A reminder can help you remember the routine; it cannot make you fall asleep.
Keep your clinician’s plan in its original form. Use a private note to list anything you want clarified, and ask your clinician before changing it. This exercise does not require uploading or rewriting treatment instructions with AI.
5. Decide whether another app earns its place
Before paying, ask what a new tool would add to your diary. Can you export your notes? Does it explain its measurements? What does it collect, share, or retain? Which features require a subscription, and how do you cancel?
Use our AI tool-testing checklist to evaluate the effort as well as the price. If checking scores increases your worry, simplify the process and discuss that concern with your clinician.
6. Know when to bring in a clinician
Contact your clinician when sleep problems affect daily activities, or when you have concerns such as frequent loud snoring, waking gasping, or persistent daytime sleepiness. These are useful details to discuss, according to the NHLBI’s diagnostic guidance. You do not need to finish a diary before asking for help.
For long-term insomnia, NHLBI identifies cognitive behavioral therapy for insomnia, or CBT-I, as a usual first treatment option. A general chatbot is not the same as a qualified clinician or an evaluated treatment program. Do not change medication or follow an AI-generated sleep-restriction schedule on your own.
Bring your original notes, the checked summary, and your questions. Those are useful outputs even if you never buy a sleep device.
Reviewed October 1, 2026. Prepared with AI assistance and checked against the sources linked above. See our disclaimer.
Featured photo: Sean Robbins on Unsplash. Illustrative photo.