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Course Library · Lesson 3 of 6
Life · Guided lesson

Use light, activity, and substance timing

About 22 minutes
Work at your own pace. Optional videos take extra time.
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Before you begin

The idea in everyday life

Arrange strong daytime cues and reduce common late-day disruptions while respecting individual health needs.

The idea

The body reads timing signals all day; bedtime is only the final chapter.

Try it

One step at a time.

Use the sample or information you have permission to use. Keep your work as you go. You can pause between steps.

  1. 1

    Seek appropriate morning or early-day light and daytime movement while following skin, eye, climate, and medical safety guidance.

  2. 2

    Schedule vigorous exercise at a time that supports rather than disrupts your own pattern and recovery.

  3. 3

    Audit caffeine amount, source, and timing, then move or reduce late intake gradually if the baseline suggests a problem.

  4. 4

    Observe how alcohol, nicotine, heavy late meals, and excess fluid affect sleep and discuss medication or substance concerns with qualified professionals.

Example

See how it works.

Taylor moves the last coffee from 4 p.m. to noon for two weeks while keeping exercise and bedtime stable enough to interpret the result.

Check your work

Did you cover these?

  • Your work includes a 24-hour cue map with light, activity, caffeine, alcohol or nicotine boundaries, meals, and one controlled timing test.
  • Check this common mistake: Using alcohol as a sleep aid because it feels sedating while ignoring later sleep disruption and health risk.
  • Your plan changes one plausible timing factor safely and preserves enough time to observe whether the pattern improves.
Your work

What to finish

A 24-hour cue map with light, activity, caffeine, alcohol or nicotine boundaries, meals, and one controlled timing test.

Common mistake

Watch for this

Using alcohol as a sleep aid because it feels sedating while ignoring later sleep disruption and health risk.

How can I tell I understand it?

Your plan changes one plausible timing factor safely and preserves enough time to observe whether the pattern improves.

Try 3 questions

Quick knowledge check

Answer all 3 questions. Get at least 2 right and the lesson completes automatically.

Not yet passed

You’ll get an explanation for each answer. Signed in? Your results save to your account.

1Which step is part of “Use light, activity, and substance timing”?
2What should you have made by the end of this lesson?
3Which mistake should you watch for in this lesson?
0 of 3 answeredApply the lesson to a short question, then review the explanation.
3
Finish this lesson

Pass the check. We’ll save the progress.

Answer all 3 questions above and get at least 2 right. You can review the explanations and try again.

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Optional course overview video · same video as Lesson 1
Cleveland ClinicTips for Better Rest and a Healthier Sleep RoutineYouTube
Optional course overview

Tips for Better Rest and a Healthier Sleep Routine

From Cleveland Clinic. Watch here or open it on YouTube .

Watch for an idea you can use in the practice below. You can pause or skip this optional overview.
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