I usually can't sleep when I'm worried about something and then nothing helps but to find some kind of solution to that problem. It doesn't have to be big discovery it can be just a calming thought, or rational version of what ever bothers me. That gives me some peace, so it definitely works in most of the cases.
If that doesn't work then I grab a book, or even better watch something that I am not too much interested in, and usually fall asleep in no time.
Other "methods" would be praying, thinking of something I am up to tomorrow, deep breathing...
For some people TV or a movie will work. If you know you're the kind of person for whom TV is a sleep aid, then this can work great (but it just wakes me up more.)
After about 20 minutes of using my powers to make women's tops fall off, I start getting into more interesting stuff. For example, I imagine myself going to the Pope, pretending that I'm god and tell him to drop the Catholic Churches more offensive positions, such as lying about the effectiveness of condoms to communities with an AIDS epidemic. Or I might magic up a spaceship, fly to China and threaten to destroy their military if they don't bring about democratic reforms. Or I'd threaten Mitch Hurwitz into writing the script for the Arrested Development movie already! There's no limit to what you can imagine if you imagine having limitless powers.
