To ensure a comfortable and healthy flight, especially for long-haul journeys, your "pre-flight kit" should focus on hydration and circulation. Many travelers find taking a magnesium supplement or a mild herbal tea like chamomile helps with relaxation and "plane jitters." If you are prone to motion sickness, taking an anti-nausea medication like ginger tablets or a pharmaceutical option 30 minutes before boarding is essential. For physical health, consider putting on compression socks before you head to the airport; they help prevent blood pooling and reduce the risk of Deep Vein Thrombosis (DVT). It is also highly recommended to apply a thick moisturizer and lip balm, as cabin humidity often hovers around a bone-dry 10-20%. From a nutritional standpoint, eating a light, protein-rich meal is better than a heavy, salty one, as salt contributes to bloating at high altitudes. If you have a history of ear pain during descent, carrying a pack of gum or "EarPlanes" earplugs can help regulate pressure changes. Finally, always pack a small bottle of hand sanitizer and a travel-size pack of disinfectant wipes to clean your tray table and armrests upon arrival at your seat.