Divine Secrets of the Ya-Ya Brotherhood

Joe Torre and Don Zimmer (manager and coach, New York Yankees): This partnership may have thrived in opposition to a common opponent, owner George Steinbrenner—until The Boss upended it. Zimmer left after the 2003 season, Torre followed in 2007.

Warren Buffett and Charlie Munger (investors, Berkshire Hathaway (BRK.A)): Usually a dominant personality, Munger is willing to submerge his ego and let Buffett take center stage. "I want the spotlight, but he doesn't," says Buffett.

Valentino Garavani and Giancarlo Giammetti (fashion designer and the brand's business manager): Valentino designed dresses and demanded attention; Giammetti handled everything else: "My strength...was to work in the back," he says.

Steve Rubell and Ian Schrager (proprietors, Studio 54): The charismatic Rubell manned the door of the famed nightclub while Schrager (aka "the Ghost") sat in the back room counting the cash and running the business.

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