So I have these melatonin pills that are supposed to help me sleep. This... sort of works. They make me sleepy. Sometimes if I fall asleep right away, then things go great, I sleep a long time, and all that. Otherwise, about an hour and a half later, I'm back to awake and I don't seem to have any more luck than usual being sleepy. Blah. The interesting thing is, I now tend to Feel Sleepy briefly around the time I take the pills... And then still not sleep well. So I think my circadian rhythm is now tuned for "get tired around midnight for half an hour then wake up again anyway without actually sleeping".