Make sure all water hoses are disconnected from outdoor spigots
Open cabinet doors below sinks to allow more heat around the pipes
Leave faucets dripping to prevent the lines from freezing
If you go out of town, DO NOT turn off the heat
If you adjust the temperature on the thermostat, only change it by 2 degrees at a time, up or down. Changing by more all at once can cause the heat to STOP working