What’s the difference between Robert Galbraith and J.K. Rowling? Clearly, being a talented writer is necessary, but not sufficient. Rowling has momentum on her side. At this point, she could publish the contents of a bowl of alphabet soup, and it would still sell better than 99 per cent of novels by hopeful first-time authors.

This is a ‘no duh’ example, designed to get you nodding your head along. But momentum is everywhere, and it’s rarely in plain sight. Without being consciously aware of doing so, I’ve written about it in four domains…