Here's what I did, and I think it was a home-run, because I got selected.
I went to Kinko's (Econo Print, etc.) and got a plastic folder with the page protectors already installed in them (not the binder kind). I made a portfolio containing all of the required documents that the unit needed. (transcripts, letters of rec, etc) I also included a table of contents and introduction explaining the contects and purpose of the portfolio.
The front cover had a picture of a KC-135, had the unit name and said "Undergraduate Pilot Training Application for "MarineGrunt." The introduction page also had a portrait of me in my service uniform.
When you hand these out to the interviewers, tell them that you assembled this for their review both during and after the interview and that they may discard it at their discression. This way, after you leave, you really DONT leave. They are left with a reminder that they may bring home and read on the crapper. When they make their decision a few days later, you are still fresh in their heads.
I also included my military training and experience on one of the pages. I tried to fluff it as much as I could while still being fair and honest. If you have prior military background, use it as your major selling point, because this was HUGE with me.
And remember to send them a thank-you letter after the interview. Prepare it ahead of time so you can send them out the same day. Get all of the interviewers names and send it to them personally. Make sure you spell their names right!!!
Good luck!