Promo Tip of the Day: Get involved.
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The book communities sprinkled across the internet provide a great resource for authors. Forget promoting your books, get involved. Discuss OTHER authors books. Get involved in gritty discussions of Harry Potter, Dan Brown, and Stephanie Myer. Add something (not white noise) to the conversation.
Nothing makes you look better as an author than well thought out discussions about what you know…books.
So sign up for an Amazon Connect account, Shelfari, GoodReads, and other online communities (like the catanetwork *wink*) and start discussing books.
Make sure to fill out your profile (with a link to your website) so that when readers come to learn more about you, they’ll be directed to the right spot. 
And if appropriate (such as groups and message boards) include a brief signature, again with a link to your website.