America's favorite doctor dishes out winter health tips for avoiding colds this season and shares his [7-minute workout](/show/segments/view/dr-oz-7-minute-workout/) so you always have time to exercise during the busy holiday season! **How can kids avoid perpetual runny noses this winter?** Dr. Oz suggests checking with your own doctor about giving your kids vitamin D supplements in the winter, when there is less sunshine. "It's the main way we enhance our immune system." He also suggests boiling or changing toothbrushes when your kids get sick.
**The holiday season brings busier schedules and less time to work out; is it more important to focus on diet or exercise when you are short on time?** The first step to good health, according to Dr. Oz, is to always get 7 hours of sleep. "I set my alarm not for when I get up - but for when I *go* to sleep," he suggests. "It reminds me!" Next, focus on healthy foods and try to fit a short workout into your day. [Click here for Dr. Oz's 7-minute workout!](/show/segments/view/dr-oz-7-minute-workout/) **Why is my skin so dry in the winter?** "I think women use too much soap, you shower for too long and you use water that's too hot," Dr. Oz says. "When you stay in the water for a long time, whether you're bathing or showering and it's got chlorine in it especially, it will dry your skin out and hot fluids will do it even more." Try lukewarm showers and eat foods with Omega3 fats. "Fish oils are particularly good because they're flexible fats - they get into your skin, they keep your skin flexible and they moisturize them!"