Buckaroo, ride through an area till you've learned it like a video game. Know where each turn and trick can be made, bunny hops over rocks and logs, then work in a few jumps, and know where the loose spoil is. I didnt memorize the loose gravel and soil before I made my jump. That was my downfall. I've been scoping that trail out all summer, six miles of nice ups and downs with some nice switbacks coming down the gas and powerl lines. I'm just glad I wasn't on them when they exploded today.
If you only know one skill on a mt bike, the bunny hop is it. It'll make it so that you never have to get off your bike or stop for obstacles. Plus, its the first stage of a good jump.