We are constantly told to make the most of our time: to stop procrastinating, to 'optimise' and 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 we are able to think in completely new ways. Drawing on groundbreaking new research, neuroscientist Dr Joseph Jebelli reveals the simple and easy steps to change your life for the better.