What do your top clients say about you when you're not around? Chris Voss, a former lead FBI negotiator and author of "Never Split the Difference: Negotiating As If Your Life Depended On It," says every business owner should ask themselves this question — and his tactic for tackling any gripes head-on is the No. 1 skill you need to achieve accelerated relationships. Listen to learn his technique and other insights you need to become an elite communicator.