Instead of using a space heater like everyone else, I run Folding@Home on one of my work machines to pump out a few hundred watts of heat. That way at least someone is getting some Alzheimer's research out of burning that electricity.
Haha this is actually an awesome idea. My work has a bunch of super cheap servers for sale that could totally be used as a space heater. Actually a super cool concept because there are so many good servers and cpus being thrown out that could legitimately be used as a space heater.