I usually keep the heat at around 68F in the day and down to 62-64 at night; I have programmable thermostats. I can't keep the place too cold because we rented a place when I was in high school that was an icebox in the winter and a furnace in the summer, so I refuse to be too uncomfortable. If it's too cold for me to do fancywork (my hands get stiff), the heat comes on.