Happiness expert Gretchen Rubin was warned that her eyesight was in peril. It shocked her into realising she'd taken all of her five senses for granted - and so she resolved to wring every ounce of joy from the sights, sounds, smells, tastes and textures around her.  

Concluding her conversation with Dr Laurie Santos, Gretchen explains how to be more alive to smell, taste and touch - building on the ideas in her new book Life in Five Senses: How Exploring the Senses Got Me Out of My Head and Into the World.