I feel like with Indy cars, you can just show up - if you are equipped to build and make a nice car, then you could be competitive. But in NASCAR I don't see that even being possible for someone to just show up with a car. There's too much evolution of the tricks and bells and whistles and all the things it takes to be fast in stock-car racing that you wouldn't know.

The mistake I really learned from was in 2005, leading the Indianapolis 500. I had a decision whether or not to save enough fuel to finish the race - which meant slowing down - or going all-out for the win. I went conservative and saved enough fuel to go to the end but finished fourth.

Every time I get into a Nationwide car after being in a Cup car, I feel so much more comfortable than I did previously.

I think you can be happy and still be competitive. A good lesson for everybody is to think a bit before you speak and represent who you really are instead of the brash emotional you.

We don't do things we aren't good at by nature. I wouldn't play basketball because I'm only 5' 1". Find what you enjoy - whether it's racing, flying a helicopter, being a doctor, or stitching clothes together. Once you've done that, you have the passion you need.

Fame can be annoying, but there are perks too.

I think there's a lot of deep-rooted history in England with racing. Lots of Formula One teams are based there. Formula One is obviously a huge sport over in England and Europe.