Sneak into her room at night and shave her head.
While your there, put up a bunch of Choji posters
Destroy all her Sasuke dolls/ posters/ shrines/ etc…
Tell Sasuke that she wets the bed
Sneak into her house and steal every embarrassing baby picture in sight
Copy all of the pictures and put them up everywhere in the village
Send the pictures to every computer in the world
Destroy all of the clothes in her closet with a flamethrower at night while she's asleep
Replace it with an Elvis suit (wig included!)
Take pictures of it the next day
Follow her around and hit her with a water balloon every time she tries to say hi to someone
Blame it on the person next to you
Paint her house hot pink with yellow polka dots
Every time she sits in front of you, poke her
Every time Sasuke passes her, start talking about her 'problems' in a REALLY loud voice.
Tell Lee that she has a crush on him
Set her up on a blind date with him
Put sand in all of her bra's and blame it on Gaara
Destroy all of her pairs of underwear except for one. Stick the remaining one in water, and then in the freezer. Leave her a note telling her where it is.
Hand this out to everyone in the village!!!