DD wrote a [url=http://www.infectiousoffroad.com/PHPBB3/viewtopic.php?f=38&t=1538]small guide[/url] that will give you some place to start.
Then... I came up with [url=http://www.jkowners.com/forum/showthread.php?t=43296]this list[/url] on JKO (posted by FAMILY-JK). I have put a star next to items that I feel are a requirement.
[u]Recovery Gear[/u]
*Winch Kit - Including Straps, Block and Shackles
*Tire Deflator
Axe
Rope
Shovel
*Leather Gloves
*Hi-Lift Jack
[u]Tools, Fluid and Repair Gear[/u]
*Air Pressure Guage
*Allen Wrenches
*Bailing Wire
*Crescent Wrenches
*Electrical Tape
*Hammer and Mallet
*1/2" Break Bar, with 6" extension
Steel Bar
*Open end/box Wrenches
*Pliers, Channel Locks and Needle Nose Pliers
*Knife
*Screwdrivers (Standard/Phillips)
*Socket Sets and Deep Sockets (Standard and 10mm-21mm) (13mm 12 point) (35mm) (T-40 torx)
*Ratchets 3/8" and 1/2"
*Wire Cutters
*Air Pump/Compressor
*Blanket
Wood Saw
Bungee Cords
*Duct Tape
*Gas
*Engine Oil
*Transmission Fluid
*Power Steering Fluid
*Brake Fluid
*Fire Extinguisher
*First Aid Kit
*Flashlights
Jumper Cable
*Multi fit hose and a roll of rubber-weld tape
*Radiator Stop Leak
T-Style Lug Wrench
Tarp
*Trash Bags
*Water
*WD-40
*Zip Ties
Fuel Filter
*Fuses
*Several Size Hose Clamps
*Tire Repair Plugs
Ratchet Straps
JB Weld
Starter Fluid
*Silicon RTV Gasket Sealant
[u]Replacement Parts[/u]
Tie Rod Ends
Drag Link Ends
Pitman Steering Arm
Upper and Lower Ball Joints
*Belts
Brake Lines
Spark Plugs
*Tire Valve Stem
U-Joints
And plenty of beer, etc.
Also.... not included in that list, but important:
*bug spray
*sunscreen
*old sheet to lay down to work on
*toilet paper
*change of clothes
*spares of any parts you can carry
*raingear
*extra jacket + other warm clothes, gloves, etc.
Surely a lot was missed... hope others will fill in the gaps.
