Im about to go out and get some plastic as well. My gas bill was 26 bucks too, but Ive had the heat on a bit more this month, and whever the GF is here she is always always cold (even at like 72) so i can tell if i dont do all i can Ill be paying out the ass for gas!
Also anyone ever heat a detached 1-car garage electrically? Its basically a carport that is sealed up w/ a garage door, and technically it is not wired to my building (i assume on the common circuit)...so thats good. Im thinking some sort of space heater...but I dunno.