I didn't write up crap about pre-wings.
I wrote about how I got to my fleet squadron, made HAC, Mission Commander (really a pre-req for HAC, but sounds impressive), FCP and NVGI while still a LTJG. Then I wrote up a blurb about JTF Katrina and how I was the only LTJG HAC from the whole wing trusted to go do that (again, think like a FITREP. Make yourself sound cooler/better than you really are) and so forth.
I then wrote more about how I took nuggets fresh from the RAG to the boat for their initial NVG RLQ/DLQs .
I then talked about how my experience in a high workload crew envrionment would be useful in a 18F, and how I look forward to continuing to serve the Navy blah, blah blah.
All of it was 3 paragraphs on a standard Naval letter. I can email the clean copy to people if they PM me.