Oh and + 2 on the travel pack of wipes! I also like to carry this
http://www.antimonkeybutt.com/ I see they have Safari towels also, this might be a good addition depending on how "outback" you are going.
Tool wise, I have found my most used stuff being:
cell as mentioned.
Flat and phillips screw drivers
Dykes (no pun intended)
Allen set
common size metric scockets
" " " open end box end wrenches
2cresent wrenches (big enough for rear axel bolt)
allen wrench for front axel bolt.
and now after a recent experiance FUSES!!!
KEEP 10 AMP IF NOTHING ELSE SINCE THIS IS THE SIZE FOR YOUR IGNITION SYSTEM!! Yep, I was caught w/ my pants down by one.
ditto on electrical tape and zip ties.
I always have a few bungies in my bags.
my homade set of jumper cabels. Saved a buddy, but also burned my 10 amp fuse! LOLOL as mentioned.
add or subtract as needed.
(the day you dont carry your tools is the day you will need them)