What are the biggest mistakes made by people applying to top tier colleges?

Trying to get SAT scores over 700. Low 700s is enough...Worrying about GPA & Class Rank too much. (Note: Many non-elite schools use SAT/GPA/ClassRank formulas. This seems to confuse people.)Doing too many activities. Do one, but at a national/international level. Do one thing you really love.Taking too many APs.Very hard to get in by being smart (top 50–200 out