You can do the same thing in the summer. Pretend that it is winter and set your thermostat accordingly. If your ideal winter house temperature used to be 77 degrees...dial it forward a few degrees and dress comfortably. If you don't already have them, put more ceiling fans in your home--office, living room and bedrooms. You will be amazed at how much energy (and money!) you can save.
Save money. Live Greener.