The best advice that I can give is remember- your job is all about the student. Too many CFI's couldn't give a darn about their students (instead they only care about building hours and moving on). CFI's that keep their student's interests at the forefront will never have an empty schedule. In addition, they're the ones that are most likely to build good networks and professional relationships that will carry them into the future.

Focus on your students and enjoy the ride! You'll quickly find that despite all you think you know about aviation, you've barely scratched the tip of the iceberg!