There are two things that I relearn every winter. I have just spent the last week relearning them again this year.
Thing number 1: If you're going to wear ankle socks and boots, you might as well wear no socks at all. The sock is going to end up scrunched around your toes before you even make it to the bus stop one block away.
Thing number 2: If you use the big warm hood on your coat, you shall be compelled to look straight ahead at all times. In order to look at something to your side or behind you, you will be required to twist your entire torso in the desired direction. Turning only your neck will result in you looking at the inside of your hood.
At least it appears that most people have remembered how to drive on ice and snow this year. Usually the first few snowfalls are really hairy.
Speaking of not learning, thanks Bill Watterson:
Calvin's mom: What did I just tell you?!?
Calvin: Beats me. Weren't you listening either?