The body of your personal statement is going to be hard work _ you need to use around 50% of your word limit to give the admission representatives concrete evidence of why you stand out from the crowd in this application process. The body is also where you will be answering questions and giving examples of experience and affects of experience. Answers and evidence need to keep reflecting who YOU really are. If you're struggling to keep under the word limit, allocate each question a word limit as well.
The introduction _ This may sound strange but saving the introduction for last is more advantageous than it may seem. Having written the body and the conclusion, you are now in the best position to tell the reader, as creatively as possible, what they are reading into. In the introduction, explain your thesis statement and how you are going to affirm it without being too specific. Do not use typical introductions such as"This essay is about..." or "The topic of this essay is..." or "I will now show that..." It is not only boring but also uncreative.