OK, I've done some research and lots of thinking, now what? Write down some ideas and topics that you think are relevant and then expand them into sentences and paragraphs. Next show your personal statement to as many people as possible to get feedback and advice and draft it again and again until you are happy with it. Always read it with a critical eye and imagine you are the admissions officer for your chosen course and ask this question: Would you give you a place on this course after reading your personal statement and WHY? _ What should I focus on if I'm an EU or International student and English is not my first language?
In conceptualizing a theme, you have to consider the main question, "What would you like to say with your essay?" For example, do you want the admissions committee to understand your choice of major and career in relation to your family background, or do you want to share your passion for your chosen field and your desire to achieve excellence in it? Whichever theme you come up with, this has to be unique to you as an applicant and should be related to your personal background, choice of major, and choice of career. The more unique a theme is, the more interesting the essay will be. In this sense, you can capitalize on personal facts you believe are noteworthy of exposition.