It’s natural, as you sign on to a new site or social network, to gravitate toward like-minded people or others working in your area of expertise. As a writer and social media specialist, I tend to follow colleagues and experts in the published and SEO fields to keep up on rumors and events. Ultimately, I realize many of the people I follow are using Twitter not so much to trade recipes and water-cooler talk about Lost and the Super Bowl, but to promote their own interests. Authors have books to sell, SEO mavens have services to exploits, and the bottom comes down to money – the more time invested in social marketing should eventually yield results.