Avoid Cliches. There are a few standard reasons why people become doctors, and so it is very easy to fall into cliched expressions and ideas. Though it's fine to express a commonly_held notion, try to find a personal way to express it. For example, rather than write "I want to be a doctor because I want to help people," discuss the ways that you have shown your generosity and kindheartedness in the past; bring specific examples__such as your volunteer experiences__so as to avoid a direct (and possibly cliched) declaration of your point. Sometimes cliches are unavoidable; just make sure your essay isn't full of them.
As much as writing a statement is of crucial importance when applying to an academic institution, some students find themselves at a loss on how to write their admissions essay. One of the best means to get help is to look for sample statements. These sample essays allow you to get an idea how you will want your admissions essay to come out, so you can maximize your chances of getting admitted.