Especially if your guest room lacks a closet—and the space for an armoire or even a dresser—don't think twice about providing clothes storage by other means. The quickest and easiest solution? Requiring none of the measuring, drilling, and leveling that'd be involved in mounting a rack to the wall, an over-the-door option provides a virtually instant, totally hassle-free solution. Plus, if you normally use the space as something other than a guest room, you can easily remove the rack and stow it away until the next time you play host again. Available on Amazon; $13.63.