Check out the movie “Switch,” which explores a wide variety of future energy options. The Geological Society of America, American Geosciences Institute, American Association of Petroleum Geologists and the Verizon Foundation are funding this for educational organizations and institutions by the Switch Energy Project (http://switchenergyproject.com/). All they ask is that when it is shown, you report the number of people who attended.
Also check out their efficiency tips page – some great ideas broken down by easy, medium and hard (for the champions among us!) and by category like water, food,office, etc.