STF
Additional material...what are the better/smarter ways to improve your package in WL case? I assume 'trying to hard' can also be a turn off.
Based on everything I've read (but not personal experience as I haven't got off a WL), send them a letter (sooner rather than later) that:
1) Reiterates your commitment to Stern. Make it clear that if they admit you, you will improve their yield, not detract from it (i.e., tell them they are your first choice);
2) Conveys any new, relevant information that wasn't captured in your app; and
3) Reiterates and/or conveys your UNIQUE value proposition. Make it clear why they need you in the class.
I understand your concern about "trying too hard" but don't think that means you should play hard-to-get. This is an elite business school, not an insecure chick you met at the bar. They have a large pool of exceptional candidates to choose from -- you need to highlight why/how you stand out. Good luck!