Peter Berg

I've been a big believer in musicians turned actor, going back to Sinatra winning the Oscar for 'From Here To Eternity.' David Bowie in 'Man Who Fell to Earth,' Kris Kristofferson's been great in a bunch of films. Liza Minnelli, Barbra Streisand, Mariah Carey, I thought was great in 'Precious.'

Sweating the small stuff is important in boxing and life. On a movie, we have production assistants who're 18 and 19 years old. If someone asks you for a cup of coffee, and you bring them a cup of coffee that's cold, I make a big deal of that. I make a really, really big deal of that. You have to pay attention to details.

The closer I get to retirement, the more I feel it will be a huge change, a shock, because athletics has been the core of my whole life. I know I'll miss the feeling of running fast, the adrenaline rush, and hearing the crowd cheering me on.