This Personal Energy Plan is a good way to start.
The list begins with the highest-impact solutions like clean energy, electrified transportation, and a plant-rich diet. While some of these items represent significant purchases that aren't made everyday, there are less expensive steps that can be taken across all categories. Even starting with the statements "I'll turn out the lights when I leave the room" or "my next car will be electric" can be meaningful places to start.
Print it out put it on your refrigerator. Being energy aware can start with actions of all sorts and sizes.
1 US Energy Information Administration, Electric Power Monthly; US Environmental Protection Agency, Greenhouse Gas Equivalencies Calculator; EnergySage
2 US Environmental Protection Agency, Household Carbon Footprint Calculator; US EIA, US Retail Gasoline and Diesel Prices; US DOE/EPA, fueleconomy.gov
3 Berkeley Institute of the Environment, CoolClimate Network Household Calculator
4 Natural Resources Defense Council, Wasted: How America Is Losing Up to 40 Percent of Its Food from Farm to Fork to Landfill; United Nations Food and Agriculture Organization 5 New York Times, Carbon Tonnage Compared; US Bureau of Transportation Statistics, Average Domestic Airfares