There are some good tutorials online, which is one way to cover some skills, then find a place to go practice...some mowed grass replicates CX terrain pretty well. The things I found to make the biggest difference were learning to do a rolling dismount. I still need to figure out rolling mounts. Those are trickier, since I don't run very fast and I have a hard time getting my bike moving to a decent speed and then trying to find my pedals.