It seems simple, but for so many, it is still not a habit to turn off the lights while leaving a room. This saves energy but also increases the lifespan of the light bulb. Double cost savings? I think so.
Seal your Doors and Windows
If your HVAC system is running and you have windows or doors open, air is escaping making your HVAC unit work twice as hard to maintain the correct temperature. It is important to also check for leaks and ensure that windows have proper sealing.
Use a ceiling fan
Consider using your ceiling fan to help cool down. It can produce a similar cooling effect and uses far less energy than your HVAC system. For some, the best way to do this is to use the air conditioner to get to the temperature you want and then switch to the ceiling fans to continue circulating the cool air.
Check your air filters monthly
Reduce your energy output from your HVAC system and improve air quality all at once.
Something as simple as using cold water to wash your clothes can cut down on the amount of energy required to do laundry by 90% in some cases. Pro tip: hang drying your clothes can limit any shrinking and wrinkles that may arise in the drying process in a machine.