Safety Gear
From www.about.com and HXOC experience
Better safe than sorry. The following safety and recovery equipment will get you out of most predicaments. And, if you’re riding with a group, then these items could come from any one of the vehicles in the group; it’s not necessary for each and every vehicle to carry it all.
  • Air pump/compressor
  • Axe
  • Blanket
  • Bow saw
  • Bucket
  • Bungee cords 
  • CB and/or cell phone
  • Cigarette lighter
  • Extra gas (in an appropriate can) & funnel
  • Fire extinguisher 
  • First aid kit (Packed in a tight weatherproof container)
  • Fix-a-flat, tire plugs
  • Flares 
  • Flashlight/lantern
  • Food
  • FRS handheld radio
  • GPS unit/compass
  • Hydraulic/hi-lift jack
  • Jumper cables
  • Leather gloves
  • Maps
  • Pen & paper
  • Rags
  • Rope
  • Rubber gloves
  • Shovel
  • Spare clothes
  • T-style lug wrench
  • Tarp – to keep yourself out of the mud and to catch small parts
  • Trash bags
  • Water – enough for you (to drink, clean up) and your vehicle (battery, radiator, washer fluid)
  • Waterless hand cleaner
  • Waterproof matches
  • WD-40/lubricant
  • Winch kit – including tow straps (5000 lbs. min, no metal hooks), shackle

There are also a number of kits and products on the market today to simplify the repair process, should a particular part fail. Some of the most popular: radiator stop-leak, silicone gasket material, plastic steel, plastic aluminum, tank sealant putty, tire plugs/patch kit, carburetor cleaner, etc.