Tips for PLME?

As a high school sophomore I still have time to make my PLME application as strong as possible. I am 100% certain that I will be a doctor and the PLME program is the perfect fit for me. I have already implemented a new program for families in my local NICU, and have an internship at the American Cancer Society. My GPA is a 4.0 UW and I plan on pursuing the IB diploma program. I also plan on starting research next semester. Is there anything I can do in these next 2 years to greatly increase my chances on being accepted?

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Bump!

http://talk.collegeconfidential.com/brown-university/1899003-brown-plme.html