Answer the prompt. In almost all cases, a law school application's personal statement asks a very specific question or gives a certain topic. Begin by thinking within the framework of this topic, making sure that each part of your response, and the response on a whole, answers the prompt in a way that lets your personal qualities shine through.
Develop a thesis. Just like an academic essay, a law school personal statement should have one overarching idea that guides the piece. Think about what you most want the admissions board to know about you and then work that idea into the framework of the question or topic for the statement.
Use strong structure. One of the most important aspects of the personal statement is the structure you use. Your statement should have a well defined introduction and conclusion. The introduction should state your thesis and preview the reasons that you have to support it. The conclusion should review these reasons and make an additional statement about what they mean for your career. The body paragraphs of the statement should move in a logical fashion toward proving your initial thesis.
Review it constantly. The first draft of your personal statement is only the first step in a long process. You should have a friend or associate read the statement and give you feedback. Review and rewrite problematic parts of the statement afterwards. Continue with this process, giving your personal statement to more and more critical people, so they can continue to help you sharpen the statement until it's as good as it's going to get.
Be clear and direct. You might be tempted to write a sentimental story, show off your language abilities or even get creative. Most of the time, though, these things only detract from clarity and a sound logic, the two things that most stand out in a law school personal statement. While you should show your passion and dedication, you need to keep the statement concise and directed.