#1 No smoking - as a lot of others said before.
#2 Drinks are OK on the highway, no-no on the back road.
#3 Only I get to eat in it Ok. If its a snack or something its OK.
#4 NO MUDDY FEET even on my floor mats... Only I can have "dirty" feet because of working with my truck.
#5 You make a mess = you clean it up.
That's bout it.
Oh yea... Mud hole? Better HANG ON!