Answer all the questions asked. However, you should avoid the temptation to submit the same essay for different questions - it's far better to tailor your response to each question and each school. If you do find yourself short on time and must tailor one basic essay to fit a number of different questions from a number of different schools, target your essay to your first-choice school, and keep in mind that the less your essay is suited to an application's particular questions, the more you may be jeopardizing your chances of being admitted to that school. Be honest and confident in your statements. Use positive emphasis.
Facts are facts.
Write an attention-getting line first. Make your first paragraph the best paragraph in your essay. Identify your main topics and themes early, at the end of your first paragraph in the hot spot. Carry them throughout. Pick two to four main qualifications for a one-page essay.