Lets see…I used scotch tape around the sprayer, not a rubber band....
I tried to put a balloon on a car's tailpipe but somebody grabbed cheap balloons that don't stretch.
I put peanut butter on the bottom of a handle to a door. The person fooled everyone but me with their poker face.
I poked a hole in a cup but so far noone picked it up, except someone getting ME a drink. They actually covered for me, saying I was just paranoid about getting pranked.
Someone tried doing toothpaste on my doorknob, but since I don't use THAT side of the doorknob, they had to close the door to make me grab it, which I did forgetting I knew it was there. Of course only a few sparkles and a little blue came off.
I'm going to let people discover some pranks leftover from 11:59 PM(too late but I've begun setting them up now so it counts) tomorrow, as well as the cup with the whole in the bottom.