I installed PV solar panels on our house, as well as installed a solar hot water system several years ago to help provide hot water to supplement our high-efficiency gas hot water heater. In addition, I installed some power-sensing power strips for our computer and entertainment system, which turns off power to all the accessories unless the main item is turned on. This eliminates vampire power. For the holidays, 90% of our lights are LED. We also have dimmers installed on nearly all of our lights.