Well...it just depends. If I fall asleep at midnight I feel I've done a good thing.
Sometimes my cycling keeps me awake until dawn (or that pre-dawn moment where the birds start to sing and I'm like "alas, please Lord sleepies) I get off the net around 3am at the latest.
I get up and lay back down. I've read all the literature on how to fall asleep to no avail. Drug induced sleep works (sometimes) other times I just feel more awake and end up falling asleep at like 11am and get maybe 20% of usual.
So I say not to Z drugs. once a month I'll have some sleepy tea. Dreaming is legitimately the only motivator for me to fall asleep.