What drug do you take when you want to get some sleep???

I think its just there to occupy your conscious thoughts with a boring repetitive task. I don't know about anyone else but most of the time when I can't get to sleep it's because my head won't leave me alone.
Plus if you're doing visualizations like I do there's not a much more peaceful headspace you can get into than a nice green pasture with sheep hopping (or doing some sweet kick flips) over a fence.
That's always been my thoughts on the subject, I'm sure if you looked into it more theres probably some legitimate origin to it.

diphenhydramine
knocks me right out but takes 30-60mins to kick in