• wear clothes that don’t melt in a fire (no polyester)
• Facemask
• Earplugs
• Antidiarrheal pills
• Wrist strap for your phone (so you can hang it on the seat in front of you and watch your shows)

My advice, travel light, the minimum you need, sure you might be on the plane for 20+ hours, but once you arrive where your going you have to lug all your extra stuff.