All of those, plus enough general knowledge of related resources & possible solutions so it's not too terrible to figure SOMETHING out should NONE of those plans work.

Frex, I keep several varieties of small hand tools in my van that don't even _fit_ anything on my van (in addition to all the ones that _do_) just in case someone _else's_ vehicle breaks down. Or I have another use for em. That, plus lots of time spent watching MacGyver when I was a kid? I can duct tape my way out of almost ANYTHING.

(I occasionally garner HILARIOUS expressions from people when they're like 'ugh I need an X' & I'm like 'just a sec' & then hand it to em)