Some of the more basic ones. Any time you are in top guard or mount, breath through your mouthpiece. You'll drool on your opponent, if you can snot a little... so much the better.
Topside north/south position, rest your cup directly on their forehead, let them know your luggage has arrived.
Without grabbing their shorts, adjust their jockstrap. Not much will change a guy's position faster than reaching up the leg of their shorts a bit.
If you can get your armpit directly on their face, win.
A little flatulence never hurts.
Work your opponents ears over to the point they are worried about cauliflower ear.
Don't wash your shorts, or wash them and leave them in the washer for a few days before competition.