I'm sure by study, you don't mean writing, especially of the thought-centric variety, but regardless: very short, quick distractions. Clearly the escapist is one such for me. Quick youtube vids, getting up for a drink, snack, bathroom, playing with cats, chatting, stretching, dance parties, music exploration, fish watching/feeding...all this works, so long as it's short lived. Sometimes I plan on staying up late working, but get sucked into these distractions, but it's not that hard to stay focused if you actually are already.
Anyway, my point is that abbreviated distractions are necessary to keep you stimulated; give you a breath for your thoughts to settle, digest, and ferment; and really just keep you feeling human.
Anyway, good luck with finals.