This article isn't necessarily about book promotion, but it is about marketing. It's by Dan Tudor who has learned how to market and sell ebooks, and who shares his wisdom here.
There's no marketer like the type of marketer who plants marketing seeds in a project as it's being developed. And there is no self-promoting, PR savvy author like an author who plants news hooks into manuscripts as they're being drafted -- and sets the stage for a successful book promotion campaign even before the manuscript goes to the printer.
Kudos to Dan Tudor for a thought-provoking article. There's information we can use for book promotion or for selling our books...even before we finish writing them!