Lotta good suggestions here. You probably won't get a chance to read this till tomorrow cuz yer sleepin' already.
When I was a kid, a friend of a friend of a friend, or someone, said that their mother told them that she'd read that there was a guy (probably in Scotland, eh, AQ?) who hadn't been able to sleep for thirty years. He had insomnia so bad, he just never slept. But he was okay, because every night, he'd get in bed, get under the covers and just lie quietly for eight hours, so he was always rested.
It's a very helpful image, turns out. Just taking away that pressure of needing to sleep or "trying" to sleep brings a whole nuther level of relaxation to the experience of going to bed.
Another thing I've found is that sometimes, while I'm still considering myself awake, if I pay attention to what's going through my mind, it's really more of a dream than a thought. My brain has gone to sleep and some other part of me, I don't know who, thinks I'm awake. So I shut that one up and let the asleep one take over.
And sometimes, when intense regret overcomes me, I picture my life as an arrow with a rope tied to it, and then I cut the rope. The past is behind me, I just let it fall away and move on. Also, I forgive myself. When I can't do that, I pretend I'm talking to a friend and the friend has my regrets, and I remind the friend that it's okay and tell her to forgive herself.
Oh, there's lots to do in bed at night, isn't there?!
Sweet dreams,
-paprikapink