I just did things I enjoyed. Red Cross Club, interning at a health/soy database, volunteering at a convalescent hospital, science bowl, a research internship last summer, and being a math tutor are my main ECs because I enjoy them. Believe me, I am not that impressive. I don't have a single award other than a CTY talent search thing. I think my essays helped me because I was able to show passion, and other than that it was an immense amount of luck.