Biggest thing for me was getting a snowboard helmet goggles, and a fat bike. Pair that with a face mask/balaclava, and that made a huge difference. Still had all kinds of issues with keeping my hands warm with my Reynaud's syndrome giving me all sorts of problems. Rode in everything from 50° to 0 with wind chills at -25° and clear roads to an actual blizzard with a foot of snow on the ground and still falling. Will clear 700 miles for the year after todays ride in, which isn't bad considering the winter, the bone chilling cold, the snow, and the fact that it is still March and I have 9 more months to go.