Use good sleep
Hygiene. If that isn't sufficient obtain medical evaluation.
1. Keep regular bed ; wakening time (includes weekends). Get up same time daily.
2. Make a regular, relaxing bedtime routine: warm bath or shower, aromatherapy
, reading, or listening to gentle music.
in dark, quiet, cool room w comfortable mattress ; pillows.
4. Use bedroom only for sleep ; sex
. Put work materials, computer.