Using a single basic theme is one method you can employ to guarantee your essay's coherence and effectiveness. It forces you to organize your thoughts and ideas and helps keep the essay focused. Without a theme, your essay will simply look like a haphazard collection of facts thrown together to impress the reader. With a main theme, the essay will have a focal point upon which you will develop the rest of the paragraphs.
Empty Words _ Since most personal statements are about 5μ lines, you don't have space for empty statements such as 'I am a hard worker' or 'I am a people person'. How can the hiring manager ascertain that this is the truth without any evidence to back up such lofty statements? You need to give them examples of your work ethic and how it positively impacted your employer as well as evidence of your interpersonal skills.