waitlisted as well...booo kellogg

I am waitlisted at Wharton, waitlisted at Kellogg. I do not know what is it about me or my application that they cannot deny me or offer an admission at both schools. The reason I applied in R1 was that I wanted be done with the process in January so I can have enough time to prepare for school. Now I have to wait till March... anyway.. My question is:
they indicate that you can send updates about you while you are in the waitlist. What do you guys plan to do about it?? Write a letter about new developments at work, maybe new exciting projects that shows leadership, or new discoveries about Kellogg that makes you even more enthusiastic about attending there?? What do you guys think the best strategy would be?
Thanks
Emir