Tip # 1: Tell a friend. Prior to venturing off road, be sure to let someone know where you are going and when you expect to return. This way, if you have an issue in the backcountry, people will know where to start looking for you. Also, be sure not to deviate too far from your route.
And 101 more common sense tips are contained in 102 Off Road Driving Tips from Matson Breakey, MetalCloak, and Del Albright, Blue Ribbon Coalition. The tips are short and sweet, but to the point.
A free Pdf version can be downloaded from: