Wherever possible, investigate the area on foot. 'You should always know what’s on the other side of the hill.' Remember your approach angle: Is the wheel or nose going to hit the ground first?
Approach the hill straight on rather than diagonally to avoid a roll. Use the highest gear in which the vehicle will ‘pull’ comfortably.
Never attempt to turn your 4x4 on a steep slope.
Be prepared for a failed climb, it happens to the best drivers. Work out an escape route and take note of where the obstacles are.