There are a lot of ways for us to cut costs. I have children, and I hate how they leave lights and tv's on all the time. I recently got the electric bill, and I about fell over. I had a quick conversation with them about doing this!
To the topic though, there are some really great things you can do to make your home more energy efficient. I recently had a neighbor who is saving 25 a month because of the window replacement he had done. Insulation also can play a major role in saving money on heating and cooling. Also, there are some home services companies that can evaluate your house for efficiency and make recommendations on how to improve.
I think consciousness is the best saver though. If you are looking for ways to save then you will continuously find ways to improve efficiency and cut cost.