Aside from the obvious hints about consistency, warm milk, cool room and the like I have a few other methods of attaining sleep.
If I'm really stuck I visualize. One is that I am a bird in a nest and I imagine what the nest is like inside and out, and how it is all lined ad warm and I am just sitting there listening to the other birds go to sleep.
The other is progressive relaxation.. I start with my toes and work up. Some people say to tense the parts of the body as you do it but I just concentrate. I sort of take inventory as I do it and notice which parts hurt. I usually don't get past the hips. You can read more about that online if you want a better explanation. I make up nonsense verses about the body parts as I work my way to the top, depending on how the body part feels