Fatter tires, lower pressure, hit stuff as straight on as you can. Stick-E or other low durometer rubber makes a huge difference as well.

As to the riding wet trails: it really depends on the trails. Some trail systems/soil types drain and are fine in the wet, some aren't. Totally depends on where you ride.

I'm not too far from Pcad, and some of the trail stuff around me is just fine when wet, other stuff becomes a boggy, mucky mess.