Prevention is worth an ounce of cure. See the wave before it eats your goat. When you know you are going to be in a vulnerable position with regards to wind and wave angle, look over your shoulder and make sure you aren't turning down the face of Everest. Instead, reach off as much as possible to keep yourself at an angle to the wave so you have options.

If you do find yourself going down the steep slope, fish your rudders hard side to side to put on the brakes (make sure your crew is hanging on) and make certain you are both held firm in your position on the boat. Ooching your rudders to slow down is a legal maneuver (sticking your appendages in the water is not). More often than not, if you can avoid going forward, you will stay pointy side up.