Don’t preheat your oven
Did you know that unless you are cooking temperamental things—such as bread or other baked goods—there is no need to warm up your oven? The next time you make dinner (be that meat or lasagna), go green and don’t turn on your oven until you put in the food. Also, never preheat for things that will cook for more than an hour—the oven will reach the desired temperature as the food cooks. By cooking with glass or ceramic pans instead of metal, you can lower the called-for oven temperature by 25 degrees.
Unplug an appliance
According to the U.S. Department of Energy, 75 percent of all electricity used to power electronics is consumed by devices that are turned off. Skip the annoyance of disconnecting electronics with internal clocks, and unplug just a few items to save considerable energy and go green.