+2
Also piggybacking on others...
First, I came to realize whatever is in Zzzquil does nothing for me, while NyQuil makes me drowsy (that's because it's the antihistamine in NyQuil that has the effect, while Zzzquil has no antihistamine). I also realize that regular use of NyQuil is not good for your insides.
Fantasizing stories - I've been doing this since I was a kid and now I have a huge cast of characters to try to keep track of in my head from a variety of genres. Putting my characters into different stories is pretty much a ritual before going to sleep. I guess it gives my mind an escape from the problems of reality and allows me to relax more deeply.
Reading is another ritual for me before going to sleep.
This one's a bit silly, but if I'm having trouble falling asleep I like to imagine all the times my alarm went off, when it was still dark, perhaps raining outside, and I had to get up for work, all the while wishing desperately to go back to sleep. Trying to recreate those thoughts and feelings often works when I realize I can go to sleep and don't have to get up.
Prayer and meditation work sometimes.
As the old song says, try counting blessings instead of sheep. Concentrating on gratitude is a great mind-calmer.
I don't want to tout drugs, but Ambien is the most effective chemical sleep aid I've found. Problem is it works too well. When I stop taking it, insomnia reoccurs. Plus you need a prescription. And I admit, the feeling before you fall asleep is quite euphoric.
Most effective (but requires discipline) is: get up early, work hard during the day, don't nap too much, get a lot of exercise and fresh air, do good deeds - all these will make you tired and able to relax easier upon bedtime.