Spend more time with your friends. Do something fun to get your mind off your parents. If you need to cry or vent, make sure you're with a good friend who will understand. Even if you just hang out doing nothing, your friend's presence can do wonders for your mood.
Show consideration for your roommate, if you have one. If you share a room with a sibling, respect their space. Don't hog the room for yourself. If they ask about the situation with your parents, keep your story neutral. Don't try to make your sibling take sides.