2. Reading and Writing
The best thing anybody can do to READ.
The more youread the better youcan find and identify bad literature and thus youlearn how to better avoid bad writing styles.
So NEVER STOP READING!!!
You can't publish, edit, or revise a blank page so first write a first draft of your book or even just the first chapter.
Of course before you begin writing have a general idea of the main plot and story basis, even if your not the type of person to write out a plot diagram with character descriptions etc. have a basic understanding of your work.
I find that acting it out or role-playing it with a friend helps to generate a moldable plot and story basis.