Put powdered graphite into door locks. Repack non-drive wheel bearings with Alaskan grease. Inflate tires in late November to maximum psi, and cap the valves. Never inflate tires outside in cold weather. Go inside heated garage or the icy air will freeze valve open.
Some people like to add a bottle every other fill up during winter.
Some carry CBs or cell phones for emergencies. Drive very slowly for the first 2-3 miles until they warm up and round out. Drive slower and brake earlier. Before intersections, pump the brake pedal gently. Slow down and prepare to stop for moose alongside the road.