Welcome to the world of microblogging -- Planning for Twitter in your business -- Joining Twitter and getting started -- Building your best tweet -- Sending messages -- Searching and following -- Keeping the tweet on key -- Hashing out hashtags -- Networking with Twitter -- Keeping tabs on the Twitterverse -- Twenty-five business uses for Twitter -- Applying elements of viral marketing -- A closer look at the need for engagement -- Gaining advantage from Twitter advertising -- Ten microblogging mistakes to avoid -- Other microblogging boosters -- Zappos.com (www.twitter.com/zappos) -- Berry chill yogurt couture (http://twitter.com/yogijones) -- Naked pizza (http://twitter.com/nakedpizza) -- Comcast (http://twitter.com/comcastcares) -- American Red Cross (http://twitter.com/redcross) -- Blue cotton t-shirts (http://twitter.com/bluecottontweet) -- Geni (http://twitter.com/geni) -- Ty's toy box (http://twitter.com/tystoybox).