You'll save money with small, 2 to 3 degree changes to your thermostat. Start by making one degree changes to find what's comfortable. I started at 78 and now keep my house at 79 or 80 degrees during Florida's cooling season. For added savings I lower the thermostat when I leave the house for 4/more hours. In Florida that means 86 degrees and it takes about an hour to recover once I get home.