Remember when Oprah Winfrey joined the Twitterverse with much fanfare not too long ago? Her tweets have lapsed, according to Seth Godin, because TV is Oprah's primary medium, and a new medium such as Twitter requires a different mindset. These days, though, it isn't just celebrities who need a media specialty. "[T]he media channel you choose changes who you are and what you do. ... Choose or lose," Godin writes.
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