Step 1
Read the whole book first
Read the entire book before you touch the mic. It is tempting to skip this on a tight deadline, but you cannot foreshadow a reveal you have not read, and you cannot pace a scene when you do not know what it is building toward.
As you read, note the shape of the book: where it starts, where it ends, the emotional high points, and the moments a line lands differently once you know what comes later. This first pass is where prep actually begins.