I have a mate who's pretty good at a sport we both like. He's fine when he gets over his attacks of nerves, but the problem is convincing him there's nothing to worry about.

Before one of our games, I let him believe that I'd given him a good luck potion. I hadn't, but he thought he had, and his confidence problem melted away. He was brilliant. And he did it all himself.

Of course that got me into all kinds of trouble with another friend of ours, as well as getting them mad at each other but we're not going to think about that right now.