Applies to Renters  
check Stop the sun's rays - close drapes or blinds to keep the sun's heat out. Solar screens and shades can also effectively block a large amount of the sun's heat before it enters your home
check Make sure the "fresh air" vent on the air conditioner is closed so you aren't cooling outside air.
  Shade helps - grow deciduous (leafy) trees where they will shade your house from the sun's hottest rays in summer and let warming sun through in winter
  Keep the heat outside - weatherize your house with insulation, caulking and weather-stripping to keep the heat outside in the summer (and the heat inside in the winter)
check Cool with fans - ceiling fans look good and help keep air moving to make you feel comfortable. Most fans use no more energy than a 100 watt light bulb.
  Set thermostats to 78 degrees F or higher - You save 3-5% on your air conditioning for each degree you raise the thermostat. Turn off ceiling fans when you're not in the room - the fans cool you, not the air.
  Whole house fans help in the evening - to cool the whole house when the temperature goes down at night, consider a whole house fan. These units draw air in from outside, replacing the warmer indoor air
  If you need additional cooling - Evaporative coolers cool the air rather than just move it around and work great in our climate. These units are relatively inexpensive to operate and can be installed on top of the house, in the attic, or on a concrete slab at ground level or even in a window
  Easy maintenance - proper maintenance is important so your evaporative cooler will run efficiently. Check your owner’s manual for details
check Don't over cool - with refrigerated air conditioning you won't speed up the cooling process by setting the thermostat at a temperature that's lower than comfortable. It will take just as long to cool as the regular setting and will overcool the area before the cooling cycle is finished which means that more energy is used than is necessary.
check Degree of comfort - if you have refrigerated air conditioning, setting your thermostat at 78 degrees F or above , instead of 73 degrees will save you up to 5% on your operating costs. And don't block vents. Move furniture away from vents and window units
  Filters need cleaning - check refrigerated air conditioning filters once a month during cooling season. Vacuum or replace them as necessary