The National Wildlife Federation has a lot of useful tips on how you can conserve energy in your home, some of which include:

• Turn off lights that you are not using.
• Install a programmable thermostat to regulate your heating and cooling when you are not home.
• Set your water heater to a lower setting or call a service person to adjust it for you.
• Hang your clothes to dry either on a clothesline or a clothes tree, at least some of the time. In the winter, this is a natural humidifier in a dry room.
• Buy rechargeable batteries and a recharger.
• The fuller the freezer, the more energy efficient it is.
• Use a microwave rather than an oven, range or toaster oven whenever possible.

For more useful tips click here.