Your introduction and even your first sentence are the most important part of your personal statement. This is where you can grab the attention of the admissions representative. Make your first sentence unique and compelling. It is recommended that you state in a creative way WHY you want to undertake this field of study in your first sentence. The rest of your introduction should provide a brief explanation that supports this first statement. Divide the word limit by the three parts of your personal statement by allocating your introduction around 30%.
In talking to Admissions Representatives across the country, there is one aspect of a personal statement they all agree on _ BE YOURSELF and let them get a feel for the type of person you really are. This includes your motivations and the ability to evaluate your personal experiences and the effect they had on you. If you can understand that 8 out of 10 personal statements fail to do this, then you are well on your way to being 1 of the 2 applicants in every 10 that stands out.