wow, a lot of you guys are just hiding your stress through busy work, i mean it's good to be proactive and shit, but cleaning? really? that's not really solving your stress, it's just distracting you from it. It probably comes back and bites you in the ass a lot huh?
Best bet is to look up some breathing techniques, get in the habit of practicing some mindfulness or as suggested some sort of meditation, once you can get your self in a relaxed state, you should probably think about what's the source of your stress, and work it out. Girls, school, family, friends, there probably is something you can do right now, or at the very least you'll figure out what you can do next time to prevent such a build up.
good luck!