Just ran across this on Tim Ferris' blog :
The Billionaire Productivity Secret and the Experimental Lifestyle
“How do you become more productive?”
Richard Branson leaned back and thought for a second. The tropical sounds of his private oasis, Necker Island, murmured in the background. Twenty people sat around him at rapt attention, wondering what a billionaire’s answer would be to one of the big questions—perhaps the biggest question—of business. The group had been assembled by marketing impresario Joe Polish to brainstorm growth options for Richard’s philanthropic Virgin Unite. It was one of his many new ambitious projects. Virgin Group already had more than 300 companies, more than 50,000 employees, and $25 billion per year in revenue. In other words, Branson had personally built an empire larger than the GDP of some developing countries.
Then he broke the silence:
He was serious and elaborated: working out gave him at least four additional hours of productive time every day.
All of us that are driven to achieve ultimately arrive at the notion of "focus" and how best to optimize our time. Clearly laundry, cleaning, dishes and shopping of (way!) off the list, but what is the trade off between being in front of the computer - on the ever expanding behind! - instead of sweating for an hour?
Until I have done what Richard has done, can honestly argue with his answer?