Mountain biking downhill may be daunting to the novice mountain biker. However, if you position your body properly and relax, you can descend just about anything.
Brake primarily with your rear brake. Lightly press your brake in and out, called "fluttering," instead of slamming it
Relax. Keep your legs and arms loose as you descend to absorb the bumps smoothly.
Keep your weight on your pedals, not the seat. Suspend your rear end over the seat to avoid unexpected jolts.
Wise the momentum of your speed to fly over smaller rocks and roots once you become more comfortable.