How can I get into Cornell?

I am an international student(India) and 2 weeks from starting junior year.My board examination results are expected to be out soon and I expect to do very well in all the papers specially science and math.I really want to study CS at Cornell.I know a great SAT score is essential.But I do know that that is not enough since Cornell is an Ivy League College.I think I will write very good essays.I think i can convey the message that I believe in sponging up every bit of knowledge that comes my way.So I will definitely won't be faking in the essays.I wan to know what specific achievements can increase my chances of getting in?I do community service.Exactly how much of it is needed?Does DI improve my chances too?