not in order and not the usual....just random thoughts.
zip lock bags
some 12 Gauge automotive wire
a pantyhose (use as a spare belt for short distances)
spare key or two
flushable wet wipes
a 5 gallon bucket with snap on lid
a 12v hanging lamp with battery connections
heavy duty trash bags
a small can of kitty litter
some small mason jars
some dried food tucked away in an air tight container
2 part epoxy putty
hmmmmm...........I will add to this later.