Plan ahead for variations in weather. Dress appropriately, and have properly tuned gear. Warmth and visibility are key safety components.
UV rays are reflected from the snow surface. Always wear sunscreen, and goggles or sunglasses, even on cloudy days.
Cold temperatures increase the likelihood of frostbite. Dress warm, bring extra layers and keep an eye on exposed skin. Go inside immediately if skin begins to turn white.
Take note of the conditions. When the snow surface is hard and fast, it is easy to ski/ride at high speed, increasing the risk for serious injury if you fall and slide. Be aware of changing snow surface conditions.