Don't be afraid of melatonin. It's one of the only things that you can take that will have NO side effects, and will NOT become habit forming. It's so safe, the pediatrician that takes care of my toddlers suggested it for both of my children since they don't fall asleep easily.

To get the best effects, stagger when you take the melatonin, and change the dosage every so often. This will prevent your body from making less of its own melatonin (it's naturally occurring as it tells your mind when sleep time is), or making more serotonin to compensate for the high levels of mela in your system.