Kristine Kathryn Rusch

As for indie writers, a lot of them don't realize that they're in the hurry-up-and-wait business, not the wait-and-hurry-up business. They work really, really, really hard at goosing the first-month sales, and then getting disappointed when those sales either go down or never happen in the first place.

Indie writers who promote their book instead of writing the next book are wasting their time. The more books you've written, the more books you'll sell. That's how it works. That's how it's always worked.