To blow my own horn as well as plenty of other FTers:
The pax who will help other less plane-savvy pax to place their belongings appropriately in the overheads. The same for the boyscouts who help others through the security process, even if it's as simple as "you'll probably need to take that belt off". It's hard to imagine a more frustrating situation than watching the same moron go through the metal detector the fourth time because they can't get it right. (I have to take my jacket AND my shoes off?!)
Thanks to anyone who comes to the rescue, on the plane or off of it.