Turning down your thermostat a degree or two could help you save on your electric bill by conserving energy. When the difference between outside and inside temperature is significant, like today and tomorrow, your heating system runs more to maintain the warmth. That's why setting your thermostat at 68° during the winter (or even cooler, if safe) is generally a good rule of thumb. At lower settings, there is less difference between the outside temp and the desired indoor temperature, which reduces the run time that your system needs to keep the inside warm.