Before you go to sleep, sit on the edge of your bed and close your eyes. Tense ad clench all the muscles in your face and head and hold it for about 15 seconds, then slowly release and wait 15 seconds. Then tense and clench all the muscles in your neck and sholders for 15 seconds, then release and wait 15. Do this routine for your chest and upper arms, then lower arms and hands, then stomach, then groin and upper legs, then lower legs, and finally your feet.
Then do this whole exercise on reverse oeder bak up your body, Do the whole process 2-4 times.
The exercise releases melatonin (sleep hormone)
Do you struggle to fall asleep? (this might be simply you are an 'owl chronotype' trying to fall asleep before you are tired?
Regular nightly awakenings?
Do you wake really early (3/4am say) and cant fall asleep again? This might be anxiety/depression.