While it could sound like adding insult to injury, something like breaking out the vacuum or doing dishes can be a great way to warm up if you're shivering at home.
Sarah Rae's post last week about keeping the heat off in her under-renovation home got me thinking about alternatives to adjusting the thermostat. Then, last night I found myself cold in my house and needing to tidy up before my mom arrived for a short visit. Rather than bury myself under blankets on the couch, I vacuumed. Within a few minutes, I was warm from lugging my Bissell around and happy to be getting the job done. Similarly, I find that I don't mind handwashing dishes so much in the winter because I enjoy the warm water.
Image: Flickr member Old Sarge licensed under Creative Commons