Waterproof shoes
It seems like WD-40 is a good friend to have during snowy days. Just as with your windows, you can spray your shoes with it, and it will help keep your toes dry until you get back home. You may look funny doing it, but the results will speak for themselves.
It not only helps with keeping your feet dry and warm, but it also helps with walking through snow and taking care of your shoes. Remember when we used it for cleaning stains? Again, you get two uses from just one spray of WD-40.