Pack smart: include thermal layers, an insulated coat, waterproof shoes, and compact cold-weather accessories in checked luggage. Keep essentials — medications, a change of clothes, and travel documents — in your carry-on in case of delays or lost bags.Plan for delays: winter storms can disrupt slots at Boston Logan International Airport (BOS) and Zurich Airport (ZRH). Book refundable fares or add trip insurance that covers weather-related interruptions, and leave buffer days on both ends of your trip if possible.Stay connected: enable airline and airport notifications for gate changes and delay alerts, download airline apps and SBB Mobile for Swiss train schedules, and have local emergency contacts noted. Consider carrying a portable battery pack and universal plug adapter for European outlets.Health and comfort: carry hand sanitizer and a small humidifier if you’re sensitive to dry cabin air, and stay hydrated on long transatlantic flights. For winter sightseeing in Zurich and nearby cities like Lucerne and Interlaken, use layered clothing and waterproof outerwear for comfort during market visits and mountain excursions.