If there is someone you don't like, pee in a bottle, break into their house, spill the pee on their bed, and repeat for a couple of weeks. They will be taking medicine, but they will constantly be "wetting" the bed. Then, become their friend and find a way to get invited to a sleepover they have. That night, spill pee on their bed again. Wake everyone up early, maybe like 6am, and ask if anyone smells anything bad. Find out that the person you hate but befriended had "wet" the bed, and continuously make fun of him. Bully him/her so hard that they go into hiding into a cave inside of Wyoming and never get out.
I found this great advice somewhere on the internet and decided to share it with all you wonderful people. My memory was kind of fuzzy, so I had to make some stuff up.