Decide on a theme for your autobiography. Make the theme individual to your own life and experiences. Write about your challenges, passions and the turning points in your life. Follow the same theme throughout the autobiography, and write in an upbeat and interesting manner.
Use real-life, concrete examples to make a point, rather than vague, universal statements. Provide examples that took place in your own life, rather than theoreticals or the experiences of others.
Show your personality and character through the essay. Use some gentle humor if you wish, but not to excess. Write in a manner that causes the the admissions officer to remember your autobiography.
Avoid repeating basic resume facts in the autobiography. Do not repeat details such as the town and state where you grew up, or when you graduated from high school. Important facts can be repeated if they are crucial to the underlying theme of your essay.
Stick to the essay guidelines provided by the college. An admissions officer will notice how closely you follow guidelines. Your odds of admission might be affected if she feels you do not comprehend -- or have ignored -- specific directions.
Plan your essay meticulously. Write a compelling introduction, outline your main theme and then expand the theme throughout the body. Provide a satisfying conclusion. Check your autobiography for spelling and grammatical errors.
Show the essay to trusted friends and relatives, and ask for constructive feedback. Take this advice, and adjust your autobiography accordingly. Proofread the essay once more.