What about doing some research about the faculty and zeroing on profs who are doing the same type of research u want to persue, contacting them and letting them know that u want to work with them. because when u apply some univs ask if u have established contact with any prof. If the prof. wants to take u then the graduate admissions office will process your application. if u find no prof. ready to advise u then no matter what your scores are u will be rejected. at least, in phd it works like this. When the prof. will like u then he/she will ask u to compete for thousands of scolarships/fellowships that these univs have - ford foudnation, kerry's wife foundation award etc., etc. so establishing personal rapport with a potential prof/profs is paramount. once the prof recommends your name to the graduate selection committee and if u have all the required scores to get into that univ., , then u are in. I am sure in harvard too it works like this