Sometimes the biggest problem is in your head. You've got to believe you can play a shot instead of wondering where your next bad shot is coming from.

Well, I think that Augusta is not the same golf course that I grew up on. Bobby Jones' philosophy was giving you space off the tee; if you put it in the right side of the fairway, you ended up getting the right angle to the green.

I learned early in my career, where you get so wrapped up and so excited, that all of a sudden you don't think. So I worked very hard to keep myself suppressed. And that's one of the reasons I wasn't gregarious with the gallery.

The biggest rival I had in my career was me. I couldn't control Arnold Palmer, Gary Player, Tom Watson or Lee Trevino. The only person I could control was me.

I remember being told by my very first photographer that if I lost weight, and I was a skinny model, it would do wonders for my career. My mum got really defensive - 'I don't think we will be doing that, thank you so much, goodbye.'

I think one of the most important things we can do for people is to expand opportunity - whether it's the opportunity to live a life free of discrimination or the opportunity to get a good job that provides a gateway to the middle class. I've dedicated my career to expanding opportunity, and it's proven incredibly rewarding.

When I think of the Olympics I only think of good things. I think of what a great event it is and what it has done for me and my career, and changed my personal life, too.

I've gone through long periods of time when there's no work for me. You wait for the next job to come along, and when it does, there's never a consideration about whether you do or don't do something.