I have been struggling with sleeping disorder the last 25 years, the only advice I could get from the doctors were taking sleeping pills but it made me depressed and I got suicide thoughts, that was why I started on self-development. Now my sleep is so much under control I can have a normal life, the cure for me is as following:
1) 20 min guided meditation everyday just before bed time.
2) no tv, computer, phone ect. the last hour before bed time,
3) Dont go to bed later than 12.00
4) Very often a nap during the day will makes it easier to fall a sleep in the evening
5) Gratitude journal before bed time
Good Luck