3. Exercise regularly
Even if you have never exercised in your life, there’s still hope: A study published in 2006 in the American Journal of Medicine took two groups of “overweight and obese, sedentary, post-menopausal women” and had one group exercise moderately for 45 minutes a day, five days a week, for a year; the other group didn’t exercise. By the last three months of the study, the women who didn’t exercise were found to have had three times as many colds as those who were active. No matter what your age or weight, exercise pays off.