So my motivation is my 16 year old daughter, You can check out her skills at:
http://www.alpinebike.com/Videos/Sovereign.mpg

If I don't keep riding, there is no way I will be able to keep up with her, as it is now she waits for me at the top of the hill .

also I make a cameo in the video, look for a big chubby clyde standing at the top of the hill watching as she rides down the trail.