What do I need to do to be accepted into Columbia University?

I have always set my mind in attending Columbia University and I want to make sure I am doing everything possible to achieve my dream. I am currently ranked number 1 in my school with a GPA of 4.571, I am Sophomore Secretary and Treasurer, I will be Junior President next year, I am also in the Varsity Swim Team at my school, I take 1 AP class because that's all they offer for 10th graders but next year I will take 4 and my senior year 5, and I speak english and spanish very fluent, and I participate in volunteering events as the opportunities come along. What else do I need to do in order to get accepted into Columbia University or any other ivy league university?