One book on directing, or even a hundred, will not make you a director. But I do hope that this book has empowered you to some extent, has taken some of the mystery out of the filmmaking process, and has given you incentive to proceed full-speed ahead in your own filmmaking career.
You've been given a methodology I'm sure you will find helpful, if you try it on. But do not hesitate to make it your own. As you become more experienced, some of the written detective work may be discarded — some — but not until it becomes second nature to you. Continue to watch films actively, even commercials. Why that cut? Why that camera move? Do I find that actor interesting? One excellent way to continue learning, short of shooting a film, ...