<p>I think all it takes is passion, hard-work, and commitment.
If you focus on your studies, and work towards your goals, you will be able to achieve the best you can. So if that doesn’t get you to Harvard, nothing else can.
So the <em>number</em> of ECs you do doesn’t count; however the <em>reasons</em> you did them do.
And a 2100+ SAT would also be pretty important, and you can’t go wrong with 6+ APs.</p>