I used to have issues falling asleep, even if I'm horribly tired. It's gotten a lot (read as A LOT A LOT) better since I started taking some Melatonin shortly before laying down. I used to take "Alteril", a combination of Melatonin, L-Trypophane, and Valeria Root, but I could get a bottle of just Melatonin, containing about 3 times as many pills, for like half or a third of the price of Alteril. Noticed no difference after switching between the two. Either way, I get to sleep easier and sleep more soundly now.