Should you focus on the various methods of teaching before you enter your classroom or should you enter your classroom first and then think about these technical aspects? Before the internet became popular, teachers had to rely on their immediate circle of advisers and fellow teachers for teaching assistants.
Of course, theoretical knowledge from books relating to teaching methods and methodologies was always present. However, even the books admit that they provide generalized information and that a lot depends on the actual classroom in which the study is taking place.
It is important to keep in mind that teaching methods can be understood by common sense alone. Do you want to eat the same food on a daily basis? Or wear the same clothes daily? If not, then why do you think your students will be interested in learning the same thing in the same manner on a daily basis?
Is your teaching interesting? Are they encouraged to participate? Are they provided information in a structured manner? Are you developing curiosity and the desire to learn more? Are your children scared of you? Do the students respect you? Do the students feel confident that they have indeed understood what you have taught? You will realize that you will have to resort to different teaching methods for different students if you want to achieve all your goals stated above.
In some cases, you will have to allow the book to take precedence and you should fade into the background. This should be done when the book and the chapters and lessons are very interesting by themselves.
On the other hand, there may be some instances where you should simply throw the book away and focus on your own personality and personal approach to get the message across. Students are smart enough to understand what you are doing. This will only make them more comfortable and relaxed in your classroom.