Good body position is incredibly important. I have been only riding for a month now, but after watching the Detention video I focused on proper position and the riding became much easier.
I ride mostly with people that are new to wakeboarding, and right away they are going out trying to land wake to wake jumps. They end up crashing more than anything. I think a foundation based on good riding position will allow you to be more comfortable on the water, and cut down on those crashes when you try jumping. Surface tricks are a great way to build that foundation.