You don't really need speed for flatspins, cartwheels etc so you might want to practice tricks that get larger as your speed increases (blunts, pan-ams, air screws, helixs etc).  The basis to almost all of these tricks is doing edge to edge transfers with a controlled bounce and lots of speed.

 

To set up: catch a wave that has a nice green face, accelerate down the face. The face is the green part (not broken wave segment, you can do these tricks in the whitewash but the speed is on the face). As your speed increases you'll want to start a bounce.  Use your body to bounce and get the pop off the wave down before you try anything else.  

 

If you feel like you've got that dialed, here's video on how to blunt.  The clip around 1:05 is a good example of the bouncing to edge transfer.  The best part about the ocean unlike most river waves is that you can do an intial pre-bounce and set up for the initiation bounce making it way bigger than just a single one bounce and move river wave.

 

 http://www.youtube.com/watch?v=dbqQfEf045w

 

Also if there are ANY surfers around make sure you say hello, be considerate, DO NOT DROP IN ON THEM (this means if a surfer is going for a wave don't try and catch it as well), if you are out of control and a hazard do not surf anywhere near them.  Also DO NOT sit behind anyone else or paddle out directly behind anyone else.  If they go for a wave you'll be in their way.   Wear a helmet as well, some people don't in the ocean and personally I think their just looking for a nasty head injury.

 

Have fun.