As a noob this is the skill I seem to need to work on the most. It really doesn't matter what line you pick if your body position is all wrong, its not going to end well for you.Weight shift.
That's how you get over almost everything.
I would say the one skill that will help get a beginner to the next level is line choice. Better riders understand their line options better.
Other beginner skills necessary to advance, as has been mentioned, is learning to look ahead.