 Cameron Starr with Energy Trust of Oregon suggests pulling down window shades during the hottest part of the day, reduce your use of heat-generating appliances like ovens, and check the filters on your air conditioner, especially if it's a window mount or portable unit. You want to make sure that you're checking those filters. And a lot of manufacturers say to check and clean those every two weeks. And if you've got pets, you probably want to increase that cycle.