Can smiling during running improve your marathon time? Will an old age app help you make better resolutions? And is there real science behind the Coffee Nap? Will and Mango examine big and little ways to improve your 2018, including why you'll probably need to carry a plunger around with you in the New Year. Featuring Lizzie Jacobs. Learn more about your ad-choices at https://news.iheart.com/podcast-advertisers