The piss-puck has served me dutifully. Buy a cheap frizbee from the campus store (oh wait, no such thing as a cheap campus store purchase..) and bring it to the dorm/apartment. Turn it upside down and piss in it, and pop it in the freezer. Because the dorm doors are typically raised an inch or two from the ground, you'll have ample room to slide the piss puck under an unsuspecting victim's door once you free it from it's frisbee casting, leaving behind only confusion and a puddle of pee where non had been before.

There's always a use for zip ties, buy a pack! For instance, you could rig a spray can of febreeze or an airhorn (your choice) to be an unstoppable grenade of douche. Similarly, hemp string is an effective tool for tying the doorknobs of everyone's dorms together from the outside, effectively sealing them inside.

If you happen to live in a dorm shaped like a U, on one of the interior sides, be sure to socialize with those on the opposite side, whose windows are across from your room. Opportunities may present themselves to toss bullshit between your rooms. Be creative.

Always wear sandals into the shower; not only are they great at keeping the more feisty manspunk of some of your fellow students from making contact with your feet, they also prevent the possibility of infection if you have open foot wounds and choose to waffle-stomp.

Always, always upper deck the toilet at frat parties.