In a small, windowless bathroom, every square inch counts, so take pains not to squander or obscure the available space. If you have an opaque shower curtain—and the habit of keeping it closed—you're making the room look more crowded than it actually is. Eschew curtains in favor of a glass shower door, if possible. The latter imparts an impression of relative openness by extending lines of sight. A potent compromise: Hang transparent shower curtains.