State of the Union's Candy Crowley has some advice for Erin (or is that @ErinBurnettCNN?) as she prepares to launch Erin Burnett OutFront on Monday evening: get on Twitter and send out some tweets. Yup. Somewhere along the way, Candy (er, @CrowleyCNN, that is) developed two top rules for surviving at CNN. One involves Twitter, and the other deals with CNN expense reports.