All appliances sold these days should have an Ener Guide rating that comes clearly posted. If they are ENERGY STAR rated, they will also have a sticker.
If you use the microwave to cook instead of the oven, cooking times will be less. This will also lower your energy use.
Only open the refrigerator or freezer if you know what you are looking for.
Warm the oven for only as long as necessary to get it to the temperature you need.
When rinsing dishes, fill the sink with water and rinse that way instead of letting the water run.
Only run the dishwasher when it’s full
Install low flow faucets to reduce water consumption.
Use energy efficient light bulbs.
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