Combination of vehicle and personal items...

Air compressor + tire repair kit (plugs+tools)
Oil
Rags
A 12” block of 4x4 to prop your jack on, in case of unstable ground
Tow rope
Basic tools
Spare lug nuts (don’t ask)
Trenching tool
Machete & folder
Ratchet straps
Tire pressure gauge
Hand wipes for cleanup

Flares or hi-viz flasher
Flashlight(s) / headlamp
Extra batteries (try to have a common size, whatever it is)
2-way radio / backup cell phone
Paper maps / compass

Stable, high calorie foods
Water + filtration/purification system
Extra clothes / shoes
Gloves
Tarp for shelter / blanket
First aid kit (lots of choices here) + meds
Fire-starting methods
Backpack / hat
Sunscreen / bug spray
Cash