Title
Tufts gives out example essays that are most liked by their admission officers.
Hamilton College, JHU, and college essay guy.com also publish essays that worked each year.
It would have to be specific to the college in that the applicant shows knowledge and interest in aspects specific to the college (as opposed to aspects shared by other more selective colleges that are commonly also applied to), why the college would want the applicant (e.g. emphasizing meeting an institutional goal specific to the college), and why the applicant is likely to enroll if admitted.
Make it very college specific, mention a class or two that you would be thrilled to take, also clubs, activities that you want to join. Show the love.!