Until I get through my PTSD I think I'm going to be hopeless for getting sleep without medication, but my husband has something that works for him. He's also tried it with our kids when they can't sleep and it's been successful for them as well. Try this:

Close your eyes and relax and try to clear you mind. Then, count backwards from 100 down to 0. My husband swears he's never gotten below 70s.

It's simply and easy to try and I hope it helps, Missi