Sleep and exercise are both activities that go well with low temperatures. Eating breakfast, however, does not. Above is a low-tech solution, inspired by Japanese inventions like the kotatsu and hibachi, both based on the idea of heating the body instead of the room. I simply put an Aladdin lamp beneath what I rather grandly might call my dining table, and as the heat rises it drifts past me. This works best with a tablecloth, but that increases the danger of something catching fire. Hanging on the wall, the lamp would only heat up the ceiling in the short time I spend eating breakfast.
Felis, The Evil Cat, approves.
Obviously, I also dress in layer after layer of wool. The indoor temperature today was below freezing, after all. Outdoors clothes are incredibly uncomfortable in these situations. Soft, loose garments feel nicer. Belts or elastic bands that cut off the circulation of air between the lower and upper parts of the body are best avoided.