Always pay attention to where the wave is breaking........... That is rule one. Know where you are in relation to the waves at all times. Slow down....... Dont get in a hurry riding. Take your time, pick your wave. If you go balls out, you are going to be worn out before you jump the 3rd wave. Just relax, play in the white wash, get a feel for how your ski reacts to getting hit by waves to the side. When you land, use more throttle than you think you need then let off. Better to get moving again a little qucker than to get stuck and nailed by a wave.
Once you are comfortable riding in the waves. You can go higher by going slower. If you are screaming half to wide open throttle to the wave your going to launch out, not up. If you are going slow and you grab the gas as you get the the bottom of the wave you will accellerate up the wave and your momentum will carry you up.