Sounds like you're a pretty average applicant, but you're in a good position. I would say do well in the interview be yourself and you'll be fine. At this point probably the best thing you could do to improve your app is to shadow as much as possible. It's probably a little late to do something like get a job in the OR or volunteer EMS.
If you're in the Tampa area, shadow some of the Tampa program's professors in the OR (if you can set that up). That way you give them a face and personality to go with your name.
Also, the earlier you get in your app the higher chance you have of being accepted.