I think all of this has probably been covered... And some of this stuff won't be relevant to most people. There's also a couple items i only grab for going to certain locations. But here's my list.

General stuff

Fire Extinguisher
Tool bag
Compressor
spares kit
First Aid Kit
fluids kit
Water
food
jacket
Recovery bag
snatch strap
sunscreen
bug spray
Tarp
Bivy
Bottle Jack
tire patch kit
Shovel
Flashlight
CB
Jumper Cables
Paracord



Tools

Lug Key
hatchet/axe
gloves
multiple ratchet straps
bottle jack
4x4 block
BFH
pry bar
lug wrench
2 Cresent Wrench
2 Vice grips
Small flathead
Large flathead
Small philips
Large philips
Channel locks
needle nose
long needle nose
standard pliers
files
Bailing wire
Duct tape
electrical tape
Zip ties
breaker bars
Socket adapters (1/2 to whatever)
torx set
allen set
wrench set
socket set
1 5/16th socket
35mm socket
1/18th socket
volt meter
2 tire spoons
JB weld
small tape measure
Wire Crimper
razor
Center Punch
2 C Clamps
Pickle Fork
Crimp Ring Pliers
Magnet
Impact
Sawzall



Recovery gear

Snatch block
Snatch strap
winch remote
D rings
high-lift
Tree Saver
Large ratchet straps
small ratchet straps




Spares

Spark Plugs
2 1350 U joints (drive shafts)
1 1550 U joint (axle shafts)
hose clamps
fuses
Break Line
Serpentine belt
Gasket maker tube
Ball joints ?? (I have this marked because I want to get a spare pair to live in my spares kit)
Nuts and bolts ?? (I want to expand this out and inventory what I have, its just a bag of bolts and stuff)
Caps for hydro steer
spare wire
wire connectors




Fluids

Power steering
break dot3
Coolant
Diff fluid
Ether
Wd40
Grease

I'd really like to add a trail welding kit, and I wish I had room for some more spares.