How can i fix my sleeping schedule?

I'm going back to school in september after months of unscheudled sleeping. I mean I rarely had to do anything, so I slept very randomly, like when i started a torrent or i have nothing to do in the afternoon, or i was simply bored because i cant find anything entertaining on TV, in varying intervals(6-36h) and lenghts(2-16h), and now i cant return to a regular sleeping pattern. I'm trying for two weeks now without any significant results.

You might like to have a look at this thread: insomnia/topic94815.html as it has many interesting ideas about insomnia.

I'd also recommend getting into a routine during the day, particularly with regard to bedtime ritual, exercise and regulating caffeine intake, and see if that helps. And not sleeping any longer than 9 hours, with an alarm clock on the other side of the bedroom if that's what it takes.