The primary power draws in your home are heating, cooling, and large appliances like washers, dryers, fridges, dishwashers, and hot water heaters. Those are the places to look if you have a high power bill and want to save money.

You can also address things like heat loss - for example, adding weatherstripping to old windows to seal up gaps, and adding a heavy thermal-liner curtain, can significantly lower your heating bills. Replace all light bulbs in your home with energy-efficient LEDs and check any appliance older than 20 years with a power meter to see if it's in line with modern standards - some will be fine, some will be wildly overusing and can be replaced to save yourself money.