So, my husband and I travel frequently and my absolute musts to always have with me, besides Purell are Wet Ones, because you need to wipe down your headrest, arm rests and that nasty tray table and the nob to release it. I’m sorry, but these are filthy. Wipe it down.
And since we now have to bring our own food and stuff on board, tuck a plastic grocery bag in your carry-on to collect your trash, the flight attendants like when you are neat and tidy in your space. 🙂