The second biggest kitchen energy user is the stove and oven. When cooking, use the appropriate size burner for the pot. Keep the range reflectors clean to reflect up the heat. New reflectors can save up to 30 percent of power. Worn oven gaskets are almost as bad as baking with the door open.
A dirty oven is an inefficient oven. Self-cleaning ovens save energy because they are heavily insulated – just don’t use the cleaning cycle more than once a month. When you do, do so right after the oven has been on, to use retained heat. Glass and ceramic pans bake in the same time as metal pans, but the temperature can be 25* lower. Don't worry about preheating the oven for most recipes. Turn electric heat off a few minutes before cooking time is over, letting retained heat finish the job, and don’t peek - opening the oven door can lower the temperature by 25 degrees.