Make sure your tires are properly inflated based of the specs on the tire, and add a bit of air to accommodate for the colder temperature.
Check your tread on your tires, this is important to maintain proper traction on the roads.
2) Windshield Wipers-
Make sure you have a good set of wipers, this is important for moving early and late season snow. There are special heavy duty wipers made to withstand the winter elements.
Make sure you always have at least 1/4 tank of gas in your car at all times. This will make sure the gas lines do not freeze and you're able to keep your car moving.
4) The Exterior-
Protect your asset and make sure to have a nice wax applied to the exterior. This will protect your car from the salty elements and also allow it to shine when getting it cleaned between storms on above freezing temperature days.
5) Keep a Safety Kit Close
Include items like a Blanket, Batteries, Portable cell charger that has been charged, jumper cables, small shovel, salt, sand, flashlight, non-perishable food in case it takes a while for help to arrive, flares, and a first aid kit.
Be Safe, Be Prepared, Have an excellent winter!