We often start a new year hoping to make big changes in how we look, feel or act. This can involve a lot of self-criticism and adopting things like tough diets and brutal exercise regimes. But being hard on ourselves doesn't deliver results.

Dr Laurie Santos examines why being a nasty drill sergeant to ourselves is less effective than being a kind coach; and hears from researcher and author Kristin Neff about why developing self-compassion is vital to helping us achieve our new year goals.