1. An Apple a Day Really Works. A natural antioxidant called quercetin, found in red apples as well as broccoli and green tea, may give an immunity boost to individuals under stress.
2. Don't Worry, Conquer Stress. Stop worrying about getting sick. The fear and expectation of having something adverse happen actually lowers immunity, says Northrup.
3. Up Your Vitamin IntakeEverybody needs vitamin D, which can be found in foods like sockeye salmon, eggs, and milk. Citrus fruits are a good source of vitamin C andcan boost immunity.
4. Mind Over Body. A positive attitude can improve immunity, and increase circulation.
5. Just Say Om. Santa Monica, Calif., yoga therapist Felice Rhiannon (Former HHC member) credits her meditation and breathing practices for improving her physical and emotional health. "A calmer mind means a calmer body."
6. Increase Your Social Ties. Extroverts are less likely than introverts to get colds when exposed to a virus.
7. Accentuate the Positive. Cohen's research suggests that people who have a positive emotional style -- described as happy, enthusiastic, and calm -- are less likely to catch colds.
8. Wash Your Hands - Over and Over. According to the CDC, proper hand washing for 20 seconds is the most effective way to avoid the 1 billion colds that wecatch each year, not to mention other infectious diseases.
9. Get Your ZZZs - Sleep is one of the best ways to stay healthy.