Mostly I have the opposite problem... I sleep too much and loose out on living my life because I am either working or in bed. My living space is a disaster, my appearance is shameful, I almost never have groceries in the kitchen... but occasionally I have a sleepless night and it's because I'm thinking about something that's really been bothering me or I don't let myself relax properly at the end of my day. I keep really, really, really weird hours so the end of my day can some anywhere on the clock. My best advice is if your body is not tired then don't TRY and go to sleep. I work at a McDonald's and so taking orders for 8-12 hrs can get really repetitive, and after a stressful day I''m still hearing "customers" order food in my head when I'm trying to sleep... I just get mad at them and realize they're not really there and they're not important and I decide I'm gonna sleep rather than worry about them.
You know that you can get free streaming college courses off the internet? Try and find something you know will be way over your head or compleatly boring to you.. like chemical plastics in the modern era... or the best of Chaucer... try and pay really close attention to what the proff is saying and I garuntee you'll be out like it's nothing. There's nothing more relaxing than sleeping durring a borning lecture! and no guilt because you don't have to worry about getting graded! I also use melatonin or sometimes 2 benadryl (both over the counter) to get me to sleep if I'm really wound up and NEED sleep (been more than 48 hrs w/o a nap)... but since I have an oversleep issue it ususally puts me out for too long so I have to make sure I don't need to work in the next 12-14 hrs after I do that or I won't make it to work on time. *^_^