Do not limit yourself to accomplishments you have been formally recognized for since the most interesting essays often are based on accomplishments that may have been trite at the time but become crucial when placed in the context of your life. Consider your favorite books, movies, works of art, etc. These questions should help you realize what you love most. Whatever you do, don't let the essay stress you out . Have fun with the brainstorming process.
Life is short.
Let the admissions office know. When considering goals, think broadly, though, and keep somewhat realistic. If after reading this entire page you do not have an idea for your essay, do not be surprised. Coming up with an idea is difficult and requires time. Actually consider the questions and exercises above.