At this point, I'm going to assume you're like me, preferring to 'self-rescue' rather than depending on others.
Typically, I'm the 'rescuer' rather than 'rescuee.' A coworker once spend months telling everyone I carried "Subaru fanbelts" in the back of my Dodge van. (He finally shut up when I dug out a roll of weatherstripping so he could fix his leaky exterior kitchen door ... and give me a break from listening to his bitching about it while we were carpooling.)
I rarely get stranded due to broken parts. This is because I tend to replace certain parts, like fanbelts and distributor caps and rotors, before they wear out. The old, still-serviceable parts go in the back for spares. (This is where the "Subaru fanbelt" came from ... the old Dodge fanbelt happened to also fit the Subaru belonging to a stranded couple we ran across on the Kenai Penisula.)
My wife used to complain (a little bit) about duplicate tools, one for the shop and one for each of the vehicles. That stopped when we broke down and she found out one of the kids had borrowed -- and not replaced -- the wrench I needed to adjust their bicycle, instead of walking an extra 30 feet to get the duplicate in the garage. (The one missing from the van turned up in the garage toolbox, along with the one that was supposed to be there.)
