Plating is an art form all its own. I am waiting for a plating class to be offered by my chef friend from Johnson and Wales University. I have already told her to write my name in first when she orders the class.
In the mean time, if you watch all those food shows like DDD, pay attention to how they plate their food. That is what I have been doing. You get lots of ideas. In fact, there are some great plating examples on this site alone.
Your cooked food looks fantastic. I'll bet it tasted fantastic, too.
Art