This video from Bikeskills.com is one of the most useful, sweetest and best edited I have come across. It will help you learn to pump track fundamentals as well as add skills and control to all your mountain biking.

If you are looking to be a smoother rider to ride with not against the terrain check this out.

(courtesy of bikeskills)

This really is the type of tutorial that is best watched rahter than read. Here though are a few general pointers:

• Always ride with your head up and ahead
• Remain active and in motion on the bike. Through a technique known as separation you can control your contact and your speed across dips, jumps, berms and all terrain.
• Through working your lower body separation you are active on your bike moving forward to back and up and down smoothly working with the terrain.
• Whilst working upper body separation your legs and hips work quietly whilst your upper body is highly active yet in control.
• With pumping you move fore and aft whilst working your upper and lower body separation and you have a smooth motion whatever the terrain
• Combine this skill with many other skills such as jumps or corners for maximum effect.

Always wear a helmet and appropriate safety gear any time you ride a bike and especially when you are learning a new and/or applying a new skill