High school freshman preparing for Harvard?

Hi, I'm a freshman in college and I want to go to Harvard (or Berkely) for Child Psychology. I'm a smart kid and it honestly doesn't take too much for me to get A's as long as I pay attention, but I understand getting into college isn't all about grades alone, but also extracurriculars and things outside the required to make you worthy of acceptance.

My question is, what kind of extracurriculars, clubs, sports, extra classes, internships, etc should I be doing to build up my resume to get into the school I want? Like I said, that's the real issue for me because grades are pretty easy for me, so no tips on that, thanks.

I'm not into anything as of yet since I was kind of unsure about clubs and such at the beginning of the year, but now that I have my goals I can prepare. I don't really like sports, but if there are some you could suggest that would help without me needing to get on a school team (as I'm not the most coordinated) I'd be open to it. Things I do like are art, writing, sociology, psychology, and theater.

You're advice is greatly appreciated as it could help me to start building the path to my life-long career! Thank you so much!

how old can you be to graduate high school in oregon

Harvard video with advice for prospective students:
http://harvardextensionblogs.wordpress.com/2010/07/16/a-few-words-for-prospective-alb-students/

Advice from a Harvard graduate:
http://www.sl2college.org/resources/resources-list/122-advice-from-a-harvard-graduate

Prospective student info:
http://www.worldwide.harvard.edu/iws/students/prospective_students.jsp

Feel free to call their admissions office to talk to an admissions counselor, or ask for the contact info of a volunteer alumni counselor in your area.