I usually find all-nighters to be counter-productive because it kills my productivity the next day or two. If you get stuck on a problem late at night you're a

I usually find all-nighters to be counter-productive because it kills my productivity the next day or two. If you get stuck on a problem late at night you're almost always better off leaving it for the next day when your mind is fresh. That aside, I do work until midnight-ish fairly regularly. I'll often drink Yerba Mate (a type of herbal tea) after supper and that can sometimes kickstart a second-wind of creativity/productivity in the nighttime.