Ok so I'm getting some air on the bigger days (head high) what im doining is bottom turning, then driving back up the face of the wave and pushing of the lip with my board extending my arms and getting pitched to the flats. I'm trying to get a full rotation but most of the times I just wind up in the whitewash.
You should be hitting the lip of the wave the second it starts to curl over then you should be leaning back hard to pull yourself off of the wave and start to rotate backwards (assuming your trying to get air that you would use to pull off a backflip). It is a very big timing thing. Keep practicing that is the key