Light
Morning outdoor light and a dimmer evening environment can help the body notice a day-night rhythm.
Look for repeatable conditions rather than a perfect night.

Morning outdoor light and a dimmer evening environment can help the body notice a day-night rhythm.
A consistent wake time is often easier to practise than forcing an exact bedtime.
A repeated sequence, such as reading or stretching, signals that demands are ending.

Snoring, pauses in breathing, persistent insomnia, restless legs, unusual daytime sleepiness, and mood changes can have several causes. If sleep difficulty continues for weeks or affects safety, work, or relationships, a qualified clinician can help assess the pattern. General sleep advice cannot identify a disorder.
Keep a short record of bedtime, wake time, awakenings, caffeine, alcohol, and daytime alertness for a conversation that is specific without becoming overwhelming.