Turn the “Fan” setting on the thermostat to the “On” position. The fan keeps circulating the home's air, which helps balance out the heat. This method is more effective in a single-story ranch style home.
Go upstairs and partially close heat registers, if you have a two-story home. Warm air rises, and closing the upstairs vents halfway results in the entire house heating primarily from the downstairs registers. Initially your heating system will run a bit longer, but it should go back to cutting on and off regularly as before.
Open curtains and blinds in south facing windows during the day. The heat from the sun helps to warm both stories of the house, so you'll use a little less heat in the evenings.