-Stop thinking so much!!!
A few years ago, i asked my brother (who somehow falls asleep within 5 minutes every time) what he dreams about. He responded, saything that he does not dream! I was like, yea right. Who doesn't dream! Then, the otherday i found this really interesting article on how to fall asleep faster. They went on to say that although there are alot of factors that affect us (light, food, water etc), the biggest reason we are not sleeping easily is because we are just thinking too much!
It's really not hard, just try not to think about anything analytical. Dream of flowers, clouds etc (don't count sheep), just don't dream of anything that makes you think.
I now see why my brother fell asleep so fast, it's because he wasn't thinking. (well, he probably was but not nearly as much as what I was).