2. BE POSITIVE. Your statement should not sound staged or stilted, but enthusiastic and motivated. Consider topics which would be easiest for you to put descriptive words to. Your personal statement is a testament of your passions and your earnestness, the image you want the reviewing committee to see of you. That image should never be negative, bland, or boring; you want the committee to say, on reading your statement, we'd like to meet this person. Avoid using "waffle" words (words which qualify your experiences and commitment) such as "rather", "quite", "somewhat", or "probably". Waffle words tend to give the impression the writer is unsure of him or herself; with the personal statement, all writing should be positive and express confidence and directness.
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.