Besides the tool kit and self jump-starter kit.

Some old school stuff....

Self tapping sheet metal screws (plug for tires) besides the regular uses.

Ivory bar soap (works for plugging fuel tanks) doesn't dissolve in gasoline or diesel.

Zip ties.

Fuse kit.

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"When the Team Chief said.... You're trapped in a hole with nothing but a goat and a slinky, what do you do? Stubby said, I'm not sure but it won't end well for the goat...." ~(Overheard) Last day, Phase 3, Q Course