You need to talk about who you are as a person, what your goals and ambitions are, what will make you a good Officer in the Coast Guard, etc. I submitted my package for the July 2010 class. PM me if you would like more details about what I wrote, I could even send you my submitted narrative to give you an idea on how I did it.
"Sometimes what you want isn't always what you get, but in the end, what you get is so much better than what you wanted."