You probably can turn down the thermostat, too. If it's electric, you can set it up on a timer. Make sure the coils on the back of your refrigerator are clean and can get good air flow. Make sure the gasket around the door is tight. Be aware that self-defrosting models use electric heat to evaporate condensed water.
CFs are expensive up front, but last much longer and save lots of electricity.
You can save this juice by plugging these devices into switched outlets or outlet strips, and cutting the power to them when not in use. You should be able to reduce your consumption considerably. And it all adds up. They are much more economical to run. This type of thermostat is programmed to turn up your heat or air when you need it.