What do you do when you're trying to catch some Z's but you just can't sleep?

I start counting breaths backwards from 1000. This always works for me. I haven't reached 1 even once. Another thing that I've tried is moving so that my head is at the foot of the bed and me feet are at the head of the bed...sounds crazy but it has worked for me a couple of times. The counting breathes backwards has never failed me though so I just use that method. Also this way my husband doesn't wake up with my feet next to his face. LOL