Agreed on having a good set of snow tires. I used to be skeptical about having to change tires but had a set of Blizzaks on my RWD fun car and got caught up in an early snow storm. I was maneuvering like the streets were dry even as I passed cars and trucks that were already in the median, against poles/trees, or crashed into each other. Even had a 4WD try to maneuver around outside of me as we were both turning right (he probably thought I'd get stuck) and watched him drift out of control into the median as I completed my turn.

As the Monkees sang, I'm a believer.