A book takes about two years to go from proposal to publication.
As Noah Kagan explains in this video at around the 5-minute mark, smart authors recognize they have two years to build up a collection of people they’ve helped who they can ask to return the favor when their book comes out.
That’s a powerful concept that extends beyond just book marketing.
Make a list of people you’d like to help you down the road, and go find a way to help them now.