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.