We are constantly told to make the most of our time. Stop procrastinating. Optimise. To be happy, creative and successful requires discipline and focus. The most important thing is to be efficient with every precious hour. But when we let our brains rest, and our minds wander, something magical happens: the brain’s ’default network’ switches on, and suddenly we are able to think in completely new ways.Blending science and personal stories with practical tips, Dr Joseph Jebell...