Items I usually take.
First aid kit (works better if you've been through a AMCROSS First Aid Class)
fire starting material, flint and steel, lighter, magnifying glass, (BTW dryer lint works great along with steel wool)
Snatch strap
Snatch block
tree protector
jumper cables
tools (metric wrenches, sockets up to 36mm, breaker bar, monkey wrench, saw, shovel, latrine tool, axe or hatchet,
550 cord
tarp
Non perishable food
Hilift
water
Tylenol or Advil
Spare fluids (oil, gear oil, coolant and ATF)
HF radio comms, (CB usually works pretty good but if you're adventurous Ham radio also)
Signal flares (local marine store usually caries them if nothing local try
West Marine)
Fire extinguisher
Clothes for the weather
Space blanket
Leatherman multitool and my Sog knife!
Might be missing a few things but thats usually whats with me