What if grudges are not just good for us but great? How often have you held a grudge and felt guilty about it? 'Forgive and move on' is the received wisdom, and that's what many of us try to do. Positive thinking is essential for a happy life, but how we get to that positive is even more crucial. What if grudges can ward off danger, and help us live better lives? What if they can act as stepping stones, pointing us in the right direction? This ultimate guide will give you all the tools you need to analyse, process and embrace your grudges in order to be your best possible self.