In each stage of writing your book, you’ll meet a most unsavory part of yourself: the Inner Critic. Single-handedly, the Inner Critic causes more cases of "I'm stuck!" than anything else.
And here's another one: As you write your book and form the chapters, it will convince you the draft is definitely good enough to show your best friend—right now, today! (This, of course, is a not-so-subtle sabotage attempt, made real when your friend asks about missing parts and you crumble with the realization that you have omitted half your story.)
Even as you revise, the Critic will get bored with your book's inner story, theme, pacing--those essential fine-tuning steps each book writer must implement. It will begin to say things like, "Edit out this part; all your friends and relations will shun you when they read them."
I'm at the final stages of the book journey with my novel which will be published in August. I'm still facing this Inner Critic. Now the message is: Everyone will know what your life is like, what you are! Hide now!