Meson Bolt

Try going to bed at the same time every night. Actually I think that's supposed to help you get to sleep, not stay asleep, but it could help. Also try to avoid naps during the day.

I've run across a couple more tips here and there, but I've never tried them myself so I can't say for sure that they'd work. They do make far too much sense not to work though.

I just go with it - if I can't get back to sleep, I browse the internet, play games, whatever; I will be more tired the next night, and probably turn in early, but it all evens out eventually