Get sufficient sleep. Eat regularly and well. Also include antioxidant-rich foods like whole grains and leafy vegetables. Stressed-out people are twice as likely to catch a cold. Maintain a good attitude.
Research shows that upbeat and optimistic people tend to dodge colds.
Check for vitamin deficiencies. Low levels of zinc, copper, and iron affect your immune functioning. Take immune-bolsterers such as Vitamin A and E daily. Sightsee in early morning or late afternoon. Don't exercise or work in the heat of the day.