What are some ways to conserve energy in the summer?

I would shut the computer down at night, unplug it too and you won't have to worry about a power surge during a storm. Keep your curtains closed to help keep out heat. I would only use the fan when there is someone there that needs to be cool, unless it gets really hot and takes a long time to get cool again. Use a microwave instead of the stove for boiling water and whenever else you can. It will keep things cooler and uses less electricity.