after spending several years as an instructor for youth groups, it's become ingrained in me to double check the kits after each use and stock them on the fly, and I have a LOT of kits- one in each bathroom, one in the kitchen and garage, and one in each car, then there's my tripping kits, a small personal hiking kit, a bigger paddling kit, and my even larger tripping kit, Finally there's what people call my trauma kit for youth groups, with such wonderful things like sutures and staples, various forceps and haemostats, shell dressings, splints and splint padding, eye irrigation kit, and even several packets of Pedialyte powder.
I try to use the various kits in some sort of rotation so they all get checked somewhat regularly.