Richard Branson, founder and chairman, Virgin Group

"My mother always taught me never to look back in regret but to move on to the next thing. The amount of time people waste dwelling on failures rather than putting that energy into another project, always amazes me. I have fun running ALL the Virgin businesses — so a setback is never a bad experience, just a learning curve."

-Taken from an interview with The Good Entrepreneur.

And here is a Guy outside the tech world, from whom Bill Gates learnt a lot of things -->