My suggestions are fairly simplistic. After interviewing many candidates I've found that many are unable to explain to me the reason they are pursuing an education at the Coast Guard Academy.
Attending any of the service academies is far more than just receiving the appointment, more than getting through Swab summer and even getting through the 4 years of academics and training.
You need to reach deep down inside and discover why is it that you are willing to go through this 5 year process (yes, 5 years includes this application year).
Far too often I hear that candidates are applying to 1, 2, 3 or all service academies but don't seem to understand that they each have a different mission.
Prepare yourself, explain why you want to serve in the Coast Guard (please, don't say you want to be a rescue swimmer...), don't focus so intently on "wanting to fly," (what happens if that desire doesn't come to be?).
Be prepared to explain about what you want to major in, how you are preparing yourself academically and physically, how do you serve others now, your perception of the life of a Swab/4C cadet.
I am confident that if you are well prepared you will come across as a very competitive candidate. Go for it!