When I was in school I had a mild case of insomnia, but I also found it to be the most creative period of my life so far. I used to write poetry every day, and I think this had to do with the fact that I could not shut my mind off, which is why I couldn't sleep very easily. Now that I am working I sleep like a baby because I have trained my brain to just shut off, but, of course, this is all at the expense of my creativity. I haven't written in a while and I feel completely drained of one single creative thought. Maybe you should start writing a story or poetry when you can't sleep.
Andy