You probably should have something prescribed for you on a PRN (as needed) basis to help you sleep. It may be an antipsychotic (I just got put on Zyprexa for this as I've been full-blown manic this past week) or a benzo (Klonopin, Xanax etc.). Some people use melatonin, which is over-the-counter, and do well with it.

Beyond that, using your bed only for sleep and sex, and not watching TV or playing on the computer just before bedtime are helpful. Of course, if I were any good at this I would sleep better myself without needing big-time drugs to knock myself out.....