I am the king of too much junk:

2 Spare CVs
2 Spare Tie Rods
Spare Belts
Spare Cap+Rotor
Spare Slave Cylinder
Tranny/Brake fluid/Water/Oil
Tools to fix said parts
Chemtool/Goop/PB Blaster/Etc
Spare Relays, wire, soldering iron, crimpers/ends, fuses
Spare headlight bulb

I had a parts truck so I took ALOT of stuff for spares. Havnt broke anything on the trail eaither, just took a tire off the bead. Oh the list dosnt include recovery/rescue/survival gear.

'90 Trooper - 2.6L 5-Speed - 1" BL - Custom Roof Rack+2x55watt ProComp - Herculined Interior - Pace Setter Header - Dynomax Super Turbo - K&N - ProComp ES3000 Shocks - Optima Red - MSD 6A - 31" Kumho Mudders - Black Rock Crawlers