Heh, heh. I was thinking of the Big L when I typed my response. Was not trying to be an ass. . .
Kunerk, shoot for leadership (sports, work, clubs, etc), an interest/knowledge of the field, good letters of rec, a high ASTB, decent grades, etc. The folks that I have seen make it in are good in all (or at least several) areas.
Email/PM me with any specific questions you may have.