With the advent of the Internet and the Web, writers now have more free and low cost ways than ever to market and promote their published books. Tactics include using services like Twitter and Facebook, to setting up their own Blog. Book widgets and other tools also make it easier than ever for a writer to promote themsleves online without having to spend any money.
Getting a Buzz On: Article from the Book Standard on how publishers are turning online to market their books.
The Italian American Press: Promoting Self-Published Italian American Books, Sci-Fi Classics, First Editions, Rare and Old Books, Self-Help Paperbacks, Used Writing and Teaching Texts, Free E-Books, and Collectible Sheet Music.
Book Promotion: Good series of articles on promoting your book from Writers Write.