The inventor of sticky notes probably didn't envision seeing them used like this. Try your hand at interior design. Decorate your roommate's room with as many sticky notes as you want. Who doesn't love sticky notes? You can jot down little snippets of thoughts and post them ANYWHERE you want. Ingenious. The idea's even better when you use it as a prank on your roommate. Post sticky notes anywhere and everywhere you like in their room. Walls, door, floor. Heck, why not just do this in the middle of the night and slap one on their sleeping forehead? The ceiling's the limit on this prank.