I just got back from visiting my daughter and son-in-law in Pittsburgh. They are renting a circa 1925 house. High on charm, low on weatherproofing. As newlyweds, and since my daughter is having some health issues, they don't have a lot of money. I got a pair of dollar store pantyhose, cut them in half, stuffed them with old socks, bits of leftover yarn (DD knits), etc, and made "draft dodgers" for the bottoms of the doors. My daughter is going to knit covers for them eventually. I also found a website detailing how to use bubble wrap as window insulation.
BubbleWrap
It really works!!! I did the side and rear windows and almost immediately the house got warmer. It kind of looks cool, too.