
I typically have problems sleeping at night - falling asleep and staying asleep. In the past I've turned to Excedrin PM, Target over the counter sleep aid caplets, or Benadryl to help me fall asleep.
On the recommendation of a cousin (who has used it with her sleepless kids (on her pediatrician's recommendation)), I gave it a whirl. And it seems to have helped.
Mayo Clinic information on Melatonin.