My father was an editor. In grade school I was entering a provincial writing contest and was in search of a topic. He instructed me to, "Write about a topic on which you have some knowlege." It was the simplest advice but as was usually the case with Dad, he knew what he was talking about. I followed his advice and placed in the top ten in the province (I lived in Ontario, Canada at the time).
The best writers I find draw on personal experiences or interests for their work. I incorporated my fights in school into my book and it fit perfectly. I knew how it felt to be on both sides of a punch.
Do you find Dad's advice to be accurate?