Where do they find your book on the bookstore shelves? It helps me to view that rough draft as a slab of meat I will carve tomorrow.
What would my reader most like to learn? Adding a book review will also come in handy to attract those readers who do a drive-through by skimming through your summary and your book cover.
Setting a daily goal will give you something to aim for. Achieving that level of endurance requires many sessions to build the discipline and strength to finish a marathon. Your social life? Finishing: Nobody cares about the book that you almost wrote.
Compartmentalize your writing vs. Would you be willing to send out some love to your friends and family? Many people are too self-centered when they write.
Once you have a plan, start writing. Say so.