Melatonin
"I've been taking it for a few months now, and love it. I've never had sleep problems before, though I always remember being tired around midday, especially since I began working in an office. After taking melatonin regularly, I don't notice it at all. One thing to note, I've always had memorable dreams, and since I started taking melatonin, I have long, interesting, vivid dreams almost every night. "