If it’s really annoying me, a melatonin a few hours before sleeping. Don’t make it a habit except as a last resort.

I feel like this one's really important for people who know about melatonin, but don't know much about the biochemistry. Don't encourage your body to down-regulate melatonin production. Shit's hard to recover from. I don't take it unless I absolutely need to and I don't take it on two consecutive nights.