I still struggle to sleep sometimes . There ways to train your mind to shut off . A friend , Rooster , would picture the the curtain of the movie theatre closing , slowly , and calm his breathing as it did , and fall asleep before it did .
My EXBIL would picture himself fly fishing in the river , striving for the perfect cast , and he has never fished in real life , but it works for him .
Neither worked for me . I tried hypnosis , all kinds of stuff , nothing .
I used to have trouble getting to sleep until i realized I was tryign to go to sleep too early. So many people talk about the perfection of the 10-6 sleep schedule, but if I try to go to sleep at 10, it takes me forever to get to sleep and I am up at 2 for no good reason. I experimented pushing later and later and at 11:30 I am actually tired, fall asleep normally and sleep all the way until I wake up refreshed and without an alarm at 6-6:30. I have used the 'flex every muscle from toes up while deep breathing' as well. Seems to help when needed.
Sleep is an odd thing. The wife is in bed at 8;30 and sleeps until 5am - she goes to bed later, she is toast.
It's very much a YMMV thing...