From the mom of a previous waitlister who did not make it off the list the first time he applied....
If you don't get the call, and REALLY want this more than anything, I offer you hope for round 2. DS enrolled at the local CC, took a 4/c like schedule (did well), retook the SAT ( improved 80 pts), took up a new sport (helped that coaches were in contact with one another), and did more volunteering. In short, he improved every area of his application, and showed desire, dedication and persistence. He graduated last year, and the extra year he waited to attend was worth it in the long run.
Sometimes the "no" is really a "not yet".
Good luck to all.