What are my chances of getting into Harvard?

Everyone applying to the top schools has the highest grades in the hardest classes and very high test scores. While you've got a great shot at most schools, you're an average applicant for a very top school. Harvard took fewer than 6% of applicants this year. What you need to do is find a way to make yourself stand out. A bunch of random activities isn't going to do that - what do you want to major in? Find a way to get involved with that now. Many students applying to the top schools have already done things like original scientific research at the college level, published novels, and started successful businesses. That's what you're up against when applying to a very top school. You also need a good reason for going there, and 'it sounds really impressive' won't cut it. The schools you mentioned don't have many top programs in common, so it looks like you're going for overall reputation of the school rather than strength in a particular major, and that's not good. They want to see passion, drive, and talent, not indecisiveness.