If you are an applicant who has been waitlisted at any of your top choice schools, be sure to have your high school send your mid-year report to them and that you also share any further evidence of your academic abilities.  This will demonstrate your continued interest in the school and can sometimes be just what the admissions committee needs in order to send an acceptance letter. Also, letters stating your continued interest can be helpful too.  Don’t be afraid to reiterate that should you be offered admission, you will attend.