Maintain your home temperature
Keeping your thermostat set @ a constant temperature will save you money and will put less strain on your heating/cooling system (and your wallet) simply by keeping everything in your home the same temp. For example; in the winter, if you lower the temp to 65 when you go to work, everything in your home becomes 65 degrees! Then when you get home and raise it to 70 it will take allot more energy and money to warm everything up, same is true for cooling in the summer. (Think about all of you furniture becoming 65, well that will take time & energy to make it 70 degrees again.) But, if you leave for an extended period of time (vacation) then lowering the temp while you're gone will save you money!