[Joe Bob]

Typically what's in the tool kit supplied by the factory, plus whatever you think you might need.

I'm sure others will chip in with comments....

fan belt, with tool for whatever engine you have to keep fan from turning
open end wrenchs, 8,10,12,13,15,17,19mm
spark plug wrench...the factory one is best, ratchet
plugs
points if you have them
zip ties
flat and phillips head screw driver
fuses
lug wrench
flat plug repair or fix a flat (not a fan)
allen wrenches
tire inflator
test light or meter
electrical tape
dykes
crescent wrenches
pliers
cell phone, prepaid towing card

just off the top of my head....