wear all black clothing, a guy fawks mask,gloves, and a hood. be sure to take all spray cans back with you, burn the gloves, and dump the spray cans 20 miles away from your school.
My sister went off to college so i dont know what to do this year, normally all of my pranks have been on her.
Like putting maynaisse (what the fuck ever) in her shampoo, or rubbing her chapstick on my asshole. One year i hid in the bushes when she came home at like 12 and popped out with a knife and chased her for literally 5 minutes through my neighborhood.
My best one was when i changed all her myspace around to make her look like a lesbian. I spent an hour coming up with a legit coming out of the closet speech, and messaged all her friends.