I've started taking melatonin recently. I've given to my daughter for years because she has a really hard time falling asleep. Me, I'm out when my head hits the pillow, but then I wake up at 2:00 or 3:00 and I'm awake for hours.
Taking melatonin makes me sleep a little deeper...when I wake up, it's easier to drift back to sleep and I don't tend to come awake.
A couple of doctors recommended melatonin for my daughter. You can get it just about anywhere these days. It comes usually in 3mg, and that's what I take. It's not addictive, either...