Keep the speed slower 28-30 so you can work on form. Skiing slower will also teach you to use your body to generate the speed and angle, rather than letting the boat create that rush for you.
ditto to what some of the others said: soft knees, hips forward (stick your peepee outt like ya got one), arms straight.
What does the fox say?
You know they all have a little string hanging out, but it's not a tampon, it's a price tag...