Apple pie. Peanut butter and jelly. Chocolate chip cookies.
What do all of these things have in common? They're pretty basic, and that's why they're knock-it-out-of-the-park hits. The last chapter of Bird by Bird has a similarly basic formula, and it's packed with great stuff the way a chocolate chip cookie is packed with chocolate.
In the last chapter of the book, Lamott tells us what she tells her students in their last writing class. It's the perfect place to squeeze in stuff she forgot to cover, things she doesn't want her students to forget, and a few more dashes of snark and inspiration.