Couple of things to add to the previous posts.
- When you go flying bring warm clothes, gloves and sturdy boots for the pre-flight, for hauling aircraft into and out of (heated) hangars onto (icy) aprons and so forth. Change into lighter gear when the aircraft is on the apron, de-iced and ready to go.
- Aircraft windows are perspex, not the layered glass that you find in a car. It scratches far easier than car windows, so do NOT use any hard object to scrape away frost. De-ice fluid (suitable for aircraft use) is the way to go if no heated hangar is available. (Any hangar with a temperature over 0C will eventually melt the ice.)
- Aircraft performance in cold weather is generally better than in warm weather (but you knew that already, didn't you).
- Keep an eye on the OAT while climbing out. If there's an inversion the temperature a few 1000 feet up might be higher than on the ground, and that may just be the life-saver you need.
- If you do end up in visible moisture (clouds, mist) in addition to getting out ASAP, also turn on the pitot heat and windshield demister/defroster.
- Carb heat may actually have a detrimental effect on carb icing, under certain, rather unique, circumstances. If the OAT is around the -10/-15C level and there's frozen water in the atmosphere (in the form of very light snow/hail droplets), then applying carb heat might raise the temperature just enough for it to melt, and then solidify again in the carb venturi or through the evaporation of fuel. Better not use carb heat in those circumstances. (I've never experienced this myself. No doubt the experts will be able to comment on this further.)
- Don't forget a camera. The countryside is beautiful after a snow shower.