After he was named principal of Osbourn Park Senior High School in Prince William County, Virginia, almost 10 years ago, the author had a meeting with his new boss, the area associate superintendent. The author asked him his opinion of Osbourn Park. His reply was direct: "This school has never really accomplished anything. People look at it as mediocre--as a school that has never reached its potential and never had a vision to be anything but average." His reply became the single most motivating factor in the author's job. In this article, the author shares how he and his staff members transformed Osbourn Park from mediocre to great by concentrating on students' whole high school experience. The author concludes that principals should know that they can reform a school; lead it to being a "great" school; and still lead a healthy, balanced life. They must surround themselves with good people, empower and support them, and let them create amazing programs that help adults connect with students to create a caring community in which kids reach their potential.