For amateur golfers, I think one of the biggest mistakes is to model their play on professionals.

If you're trading individual securities, you're almost certainly making a mistake. Because most professional managers can't outperform their benchmarks, and there's little reason to think that individuals can.

Countries all around the world, starting with the U.K., have started behavioural insight teams, often referred to as nudge units. And they seem to be doing lots of good.

There can be legal conflicts over whether registering intent is enough to qualify you as an organ donor or whether a doctor must still ask your family's permission.

I do not care for the money, just for the glory.

If you have sold the film rights to somebody, take your money and leave. If the producers need you, they will call you. But you have to be careful about who you are selling your book to, and ensure that it is not tampered with.

If you want better behavior from bankers, then make their financial incentives more like those in the hedge-fund world - where managers have 'skin in the game,' and their net worth is tied to their long-term performance.

I have not cared for money, and I enjoy working. Money comes my way. People work hard so they get enough money. Or they work hard so they don't have to work hard later in life. But though I don't need money, I still work hard because I like what I am doing.