How can I get into Stanford?

You're off to an excellent start. There is nothing I would suggest that you change. My only concern would be that a school of the caliber of Stanford or UCB is a bit overkill for something as seemingly mundane as journalism. It's akin to going to Princeton to learn how to be a mailman. With your outstanding credentials and potential, I'd aim for a major worthy of such achievement; at LEAST some type of business degree, if not a loftier scientific one like pre-med or law!