Best Pranks?

[myles26]

I am in a prank war with my roommates (college) anyone have any good ones i could use on them?? 

[lguzman1]

I once went to the store with my Mom and my family are jokers. We were in the toothpaste isle and my mom ask me something that right now i can't remember, but the think is there was a lady there and I tell my mom why don't you use this for your denture Mom, my mom said shut up I don't have dentures, I start talking to the lady and ask her there is no shame to having denture right my mom gets embarrass. My Mom starts hitting me and laughing telling me to stop. My daughter try to do the same thing with depence, but I just play along with them; They are still trying.

[Liquidfire_43]

-Sugar and salt switch
-Number post-its (1-3 or higher) and place it on easily spotted places... Just make sure you leave one number out... For instance 1, 2, 4, 5