1. Develop a vibrant blurb to describe your book to someone in a couple of sentences. If you can't do that - revisit your work. The writer unable to do this often has a problem with their book - so see how well you can define (in selling terms) your work.
2. Establish "talking points" about your book: what sets it apart? what sets you apart? why should someone buy your work?
3. "Lattice" your work to other venues and events. Do a web of your book and identify all the parts and how you might market the book to those sub-sections.