I find that I need a cutoff point where I'm not allowed to do any more work. Otherwise I'll be thinking about work and productivity up until the point where I l

I find that I need a cutoff point where I'm not allowed to do any more work. Otherwise I'll be thinking about work and productivity up until the point where I literally become unconscious (fall asleep). Sometimes I read/listen to educational stuff. I try to keep it on the lighter side. Sometimes I listen/watch comedy. Right now I've been watching Seinfeld before bed. Before that was Khan Academy history. I remember hearing advice from some credible source (that I can't remember) that it's not good to keep trying to fall asleep when you are struggling. I think 20 minutes was the point where it was recommended to get out of bed and do something else for a bit. Anecdotally, it works reasonably well for me.