Bestselling author Gretchen Rubin shares insights from her book "Life in Five Senses," in which she reveals how honing in on her senses provided a fresh perspective on her life. "It just hit me that I was taking it all for granted," Rubin said. With COVID-19, the experience of losing senses like smell and taste is a reminder of how important they are for mental health and engaging with the environment. Plus, Rubin explains the links that sight, sound, touch, taste and smell share with memory, mindfulness and happiness. She describes how these senses can work together in unpredictable ways.