Anonymous wrote:Toothbrush, toothpaste, moisturizer, stuff to wash your face.
Clean undies (full clean outfit, dependening on what you are doing when you arrive).
For a redeye, I bring a really warm fleece and a blanket, but I get cold (not actually a blanket--I have a silk knit sleeping bag liner, which packs super small).
Water bottles (empty) -- fill once you are through security
External battery for your phone, phone charger
Couple of granola bars. Dark chocolate.
Books, headphones.
Excellent list here, especially the toothbrush / toothpaste and clean underwear.
If possible, I like to take at least one active thing to do - needlepoint, embroidery, even coloring. I get bored reading or staring at a screen, and it hurts my eyes after a while.
Dress in layers. Wear or bring something comfy for napping, like sweats. Warm socks.