The skill of "terrain awareness" is a primary skill used to descend a popular feature named "Blood Rock." Check out this quick clinic on terrain awareness:
We used both the skill of terrain awareness and the skill of body position in order to ride this skinny that was about 1.5-2 stories above the creek bed. Even if you are not planning on riding a skinny that high, these two skills that I teach in Ground Control 1 can be very helpful to you when the trail gets narrow. At about 20 seconds into this video you can see what body position I'm using.