There is no such thing as "the perfect way to write a statement." There is only the one that is best for you and fits your circumstances.

There are some things the statement should not be:

• Avoid the "what I did with my life" approach. This was fine for school essays on "what I did last summer." It is not good for a personal statement.
• Equally elementary is the approach "I’ve always wanted to be a __________." This is only appropriate if it also reflects your current career goals.
• Also avoid a statement that indicates your interest in psychology because of your own personal psychological problems. While this may have motivated you, this is not what your audience is necessarily looking for in your statement.

These are some things the statement should do:

• It should be objective yet self-revelatory. Write directly and in a straightforward manner that tells about your experience and what it means to you.
• It should form conclusions that explain the value and meaning of your experiences such as what you learned about (1) yourself; (2) your field; (3) your future goals; and (4) your career concerns.
• It should be specific. Document your conclusions with specific instances or draw your conclusions as the result of individual experience.
• It should be an example of careful persuasive writing.