Highlight your accomplishments _ Some of your achievements may not fit into any categories on the application; talk about these accomplishments in the personal statement so they aren't left out. You could also use the personal statement to elaborate on an achievement that you are particularly proud of, but could not address in detail on another part of the app. Think of the personal statement as an opportunity to tell admissions officers anything you want them to know that wouldn't be perfectly clear otherwise. Don't be afraid to brag about yourself; your application is really all about selling a product__you__to the college.
When you are sifting through the vast amount of sample you will have access to, be sure that you are looking for samples that will pertain to you and your personal situation. Once you find sample personal statements that you think have helpful information you can print them out and highlight any areas that you feel may help you when you set out to write your own statement. It is also a good idea to take notes as you go along.