A statement of purpose should really be one-page and only one-page. If you have little chance of getting in, try something daring. The key is to get more than one point of view, and then compare these with your own. Does the school have a close-knit traditional college campus?
With greater numbers of applicants to graduate programs, the trend is toward shorter essays. For strategies for meeting word limits, see our handout on writing concisely. Remember, you are the one best equipped to judge how accurately you are representing yourself.
Why do you like helping people?