Four things that earn their spot in the bag by each killing one specific travel misery: a pocket translator with free lifetime data for the language barrier, a packable cushion for the board-hard economy seat, a mouse that folds to coin-purse size for the tray table, and a neoprene wedge that finally closes the car-seat gap your keys keep falling into.
A pocket translator for 112 languages with free lifetime data built in
→ amazon.com
A pocket-size folding mouse that runs 22 hours on a one-minute charge
→ logitech.com
The neoprene wedge that closes the car-seat gap for good
→ buydropstop.com