Winston Churchill: A characteristic of lustful leaders is insatiability. Churchill, commenting in 1938 on the rise of Adolf Hitler, said the appetite often “grows with eating”. Photograph:  Capt Horton/Imperial War Museums

Liz Herring was a driven debater. At school, she carted around a metal box of index cards so she could swot up on topics between classes. A debate tea(...)

The key to the successful thank you: three of my mother’s four principles apply to the thank-you email

I know a woman who can get people to do whatever she wants. She can make busy executives give her their evenings, their thoughts and their money. On v(...)