The best negotiation tactic you can use is silence, says a media mogul who's a 'nightmare' to negotiate with

University of Exeter/flickr "Anyone who has negotiated with me," says Joanna Coles, "knows I can be a nightmare." Coles is the chief content officer at Hearst Magazines; she's served as editor-in-chief of both Marie Claire and Cosmopolitan magazines. She's also a board member of Snap. Coles is notorious for her gutsiness — she once ambushed a woman in a bathroom stall in an attempt to land a scoop — so it's not entirely surprising that she characterizes herself as a fearsome negotiator. On a...