It might be a little hard to grasp, but where I ride there are a LOT of roots, and usually on the descents and climbs. One thing I've found myself doing on the climbs (right or wrong) is that when the front tire begins to clear a root, I will almost use the front wheel like a lever to pull myself forward. Twisting sideways a bit, then back forwards. It never feels scary or out of control, and the wheels are fine after several trip out there. I am not putting all my force into doing this, just a little extra oomph up the trail. Not once has the front wheel felt like it was lodging between the roots or anything of the sort.

I don't seem to have any fear while doing it, and for the most part I am loose and comfortable. I have my body floating over the bike, shifting my weight, etc. Aside from having the front wheel wash out on a slippery bridge, I am not doing too bad I guess?,,,,BD