Do things like wash your clothes inside some cold water, if you can. Almost 90% of the energy you use when you do laundry is due to heating water. Cold water will do the job just as well; all you need is an effective clothes washing detergent. Also, make sure your load is a full one so you do not waste energy washing several small loads.
If you use fuel to heat your home, ask a professional about using biodiesel instead. Some systems do not need any modifications in order to use biodiesels. The bonus of doing this is a cleaner burning fuel that is generally also more efficient, and you'll lessen your impact on the environment also.
Use drapes or curtains in your windows for when you are not home. The result will be a cooler house because the window's admit less heat. Generally, your home's south-facing walls and windows receive the most sun exposure. Try adding window coverings that block heat, such as shades or darker, lined curtains.
There are no easy answers to the energy problems of today's society, but learning everything possible about energy sources is a good place to start. The more people understand various energy sources, the better changes can be made.