ljubitelj, if you couldn't be bothered to search old threads, how will you manage Norwegian or Swiss method of cutting snow cover to check stability or avalanche danger?
Be cautious on: seracs, crevasses, cliffs, avalanches, crampons catching, inadequate equipment, improper equipment use, shorter days, lower temperatures, cornices, weather conditions (fresh snow, heavy snowfall, fog,...), ice on exposed parts, ice on rocks, harder snow navigation, snow blindness, wet clothes in cold, always ice axe with crampons, gaiters on crampons, after heavy snow wait for settling, hypothermia, frostbite, chilblains, blisters, drinking water can freeze, iodine in winter not recommended, yetis kidnap people,...