Save energy. Install a ceiling fan.

Consuming only one-tenth of the energy of air conditioning, a ceiling fan can make a room feel up to 10 degrees cooler. A ceiling fan is no more difficult to install than adding a new light fixture—and, let’s face it, a lot more attractive than an air conditioner stuffed in your window frame. Furthermore, using the reverse-direction setting in the winter, you can pull warm air down from the ceiling to help stay cozy. Be sure to look for an Energy Star–rated model for maximum savings.