Joanna Hillman, Senior Fashion Market Editor, Harper's Bazaar

“My mom told me: Besides the obvious — taking care of your skin — that she believes physical activity is probably the most important. She plays golf five times a week and carries her clubs. She also bikes, swims, and in winter, she works out, cross-country skis, and does yoga. Creams and cosmetics will only do so much. Keeping physically fit is the most important beauty secret.”

Photo: Courtesy of Joanna Hillman