Mike Coppola/Getty Images for Heineken

Meetings with Dolf van den Brink, president and CEO of Heineken USA, come with green and red cards, with employees asked to display the green cards when they agree with what's being said and the red ones when they've got objections. "If there's no constructive conflict, if people don't feel comfortable publicly disagreeing, you're never going to get great ideas," he says.

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