It's something we need to bottle - the secrets to a happy life that is. But while there are plenty of ways to improve your levels of happiness, Shannah Kennedy and Lyndall Mitchell, the authors of the book Shine, 20 Secrets To A Happy Life, explain...

When it comes to the ravages of anxiety, Elisa Black does not hold back. “My anxiety is a wild beast,” she says. “It has destroyed relationships, clawed at my insides until I was sick, left me cowering under blankets, plagued me with panic attacks...