As an actor, if you step to the side and you look at [Thornton's performance] technically, and you try to imagine doing what he was doing, most people would panic. Most people would be on the set, and they would be panicking, going, "I'm not doing anything!" All the ham instincts in you would be screaming, "You've got to indicate something here." And it's beautiful, in a way. And so I appreciate, even as an audience member, the courage that it takes to be... frankly, to be subtle.

Practiced poorly, tourism can be extremely negative.

To me, Fight Club was a comedy. When [David] Fincher sent me the book and I read it, the first thing I asked him was, "This is a comedy, right?" he said, "Yeah, that's the whole point," and I said, "Okay, I'm in." I certainly wasn't imagining myself as a dramatic actor when I was running around in my underwear in that film.

Instead of telling the world what you're eating for breakfast, you can use social networking to do something that's meaningful.

Identical twins are endemically alike in many ways.

I studied French forever, and when do I ever speak French? I clearly should have studied Spanish. I wish I had stuck with music, because that would still be great. I really wish I had learned to surf earlier in my life.

But look at Avatar (2009), one of the most globally viewed pieces of entertainment to have ever been made - the central emotional event of the whole movie was a tree being cut down. And the entire movie, essentially, is saying, "If we let the military industrial complex trash the place that we're living in, we will have committed an epic crime."