Pack a variety of warm accessories: several pairs of socks, a hat, gloves or mittens and a scarf or neck gaiter.
Take a few thin, long-sleeved shirts, turtlenecks and thermals for layering. Avoid packing bulky sweaters and jackets; opt for light sweaters instead.
Include one pair of long underwear.
Pack one warm fleece jacket or lined windbreaker.
Take a fanny pack, which can house lip balm, hand-warmer pads and an extra pair of socks for day trips.
Keep sunglasses and sunblock handy at all times, especially when visiting snowy areas.