7. Do not leave appliances and devices on (or even plugged in) when you do not need them
A lot of people inadvertently heat their homes over the summer when they could avoid doing so with a little forethought. They choose to bake a dish in the oven for a couple of hours instead of cooking on the stove, or better yet, grilling out back. Sometimes they leave lights on when they are not in the room. Not only does this waste power on unnecessary lighting, but it also adds heat to the house. The AC then needs to work harder to cool the room down, resulting in even more energy drain.
Leaving devices, which are not in use, but plugged in to the electrical outlet can also waste power. When you are not watching TV or playing on your console, unplug these electronics and switch off the power strips. Cell phone or laptop chargers are often left plugged in, so make sure to unplug these items as well.