March 21 - April 19

Drink the optimal amount of water. Winter dries out your body. Stay hydrated to keep your body working effectively.

Apr. 20 - May 20

Keep stress to a minimum. High stress levels make a person more susceptible to catching colds. Aim to spend at least one night per week with friends and family.

May 21 - June 21

Eat a healthy diet. Try eating an extra piece of fruit or more vegetables each day to keep your body healthy.

June 22 - July 22

Exercise regularly. Get outside, take a short walk, and enjoy the cooler weather.

July 23 - Aug. 22

Sleep enough each night. The average person needs 6-8 hours of sleep per night. Any less sleep makes your body vulnerable to illness.

Aug. 23 - Sept. 22

Wash your hands often. Keep bacteria and viruses off your hands and out of your mouth and eyes.

Sept. 23 - Oct. 22

Lessen sugar intake. High levels of sugar from cakes, cookies, or store-bought fruit juices can compromise your immune system.

Oct. 23 - Nov. 21

Dress appropriately. Layer your clothing so you can remove items as you warm up. Cover your head, hands and feet to keep your appendages warm.

Nov. 22 - Dec. 21

Wash your sheets. Toss your blankets and pillowcase into a hot wash once every couple weeks to wash away any bacteria that accumulate.

Dec. 22 - Jan. 19

Protect your skin. Sunscreen is important during winter. Colder seasons mean a thinner ozone layer to absorb the sun's UV radiation.

Jan. 20 - Feb. 18

Add garlic to your diet. Raw garlic has natural nutrients that boost the immune system and fight off the common cold.

Feb. 19 - March 20

Be smoke-free. Smoking weakens the immune system by depressing antibodies and cells that are in the body to protect against viruses.