Well, we didn't last very long before we caved in and turned on the heat.
I'm not so sure we were saving much energy, anyway. Especially since we were heating up bean bags in the microwave oven to use as bed warmers and sticking the kids' clothes in the dryer every morning to get them hot and toasty before getting dressed.
We have been experimenting with keeping everything unplugged when not in use (though I have to keep reminding the kids that they CAN'T unplug the refrigerator). I'm not sure that we're saving any electricity, but now I've realized how much I depend on my microwave oven clock!