No, unless you are absolutely remarkable in every way, it is a closed system. One of my friends is an alum (now retired professor) and conducts interviews in our region for prospective applicants who Harvard has shortlisted. Harvard uses 'known commodities' like him to vet applicants. Here's how it works:
You ace your SAT, you are involved in sports, but you have a subscription to a magazine like The Economist (as opposed to pedestrian rags like Newsweek), you've been interviewed several times by local news agencies for academic and charitable accomplishments, you have a 4.0 GPA, etc. Now, you're just an average Harvard applicant. Seriously, you're no longer 'amazing'...you're just like everyone else whose application isn't immediately thrown into the trash.
Now, if you get to meet my friend, it is far from a guarantee that you're anything special, so don't get cocky...just because people at your crappy high school thought you were brilliant doesn't mean a thing. Sure, some people might get in based upon a family legacy (dad and grandad went to Harvard? Your chances just improved a bit), but people like my friend are ridiculously smart...I'm a PhD, I've written academic works, etc...I know smart, and my friend is off-the-charts. Here's the great thing about him: He's completely humble. Anyway, I digress.
So, if you get to meet him (or his equivalent) at Harvard's request, he will take you out to lunch, ask you a lot of questions about your background, why you want to go to Harvard, what your parents are like, what musical instrument you play, how you spend your time during summer holiday, whether you see a connection between what is going in in Venezuela and Ukraine, etc. He is secretly seeing whether you can handle yourself without being either shallow or obsequious, then he'll write his findings to Harvard admissions. They will then shortlist you again, and perhaps, offer you a spot. Next, you have to find a way to finance a $60,000/yr education...the good news is that Harvard has a huge endowment, so you'll probably pay only a fraction of that unless your parents are filthy rich.
TL;DR: If you have to ask how to get into Harvard...you won't get into Harvard.