They usually give you some direction on what to write about... what do they say? If it's the "tell us something about you" essay - remember that the schools have an agenda, too. Don't just talk about what you want - tell them why they will be so very glad that they admitted you.
Regarding your grades, a high GMAT/GRE/Whatever test scores can help to compensate for a mediocre GPA.
at 9:28 PM on May. 21, 2011