Apart from the known stuff like deflators, gauges, etc.. what do you have in your toolbox that has either saved your buttocks a few times, or you deem as an essential tool of equipment while going off-road ?
I'll start with mine:
* Adjustable spanners and some basic wrenches up to size 13.
* Basic screwdriver set (Philips and flatheads).
* Multimeter/tester.
* Some hose clamps for compressor hoses.
* Tie-wraps
* Electrical Tape
* Set of fuses (5,10,20,30 Amps)
* Pieces of nylon rope to tie something down temporarily.
* Headlight / Torch.
* Allen key set.
* Some speaker wire for doing small repairs when necessary.
* Spare set of stem valves.