Deodorant
I keep doing stupid things like misplacing my deodorant and hairbrush. As a result, I now have about three sticks of deodorant in various spots around my apartment, because I can be guaranteed to not find one where I first look for it. For some reason I am never in the bathroom (the normal place for keeping such things) when I want to put it on (despite the fact that one puts it on right after one bathes). So, there's one in my bedroom, one in the livingroom, and one that floats, ending up wherever I happen to drop it.