Here are a few tips on boosting your immune system and enjoying your winter: Ingest warm food and liquids. Wear a hat, gloves, a warm coat outside, and down slippers inside. If you get cold you are using too much energy to keep warm, rather than having your energy go towards your daily functioning and immune system. Sleep at least 8 hours a night. Take a walk for 20 minutes. Practice your Pilates. Circle your hands and feet. Stretch your fingers with the palm facing up. Rub your jaw muscles. Breathe into your sides and back (kidney area) when you need to get warmer or acquire more energy. Belly breathe to relax. Good luck!