That syncing feeling
The problem with doing one little minor computer task late at night (like, say, "sync my new books to my iPad so I can read a little before I go to sleep," just to pick an arbitrary example totally at random) is that something inevitably goes wrong. And then you spend the next hour trying to fix not only whatever went wrong, but all the other things that went wrong as side effects, only you're very sleepy and so everything is harder and you're more likely to make further mistakes.
Not that I would ever do anything like that.
