Avoid touching your eyes, nose or mouth since these are vulnerable areas for germs to enter the body - Centers for Disease Control.
Lather and rinse your hands twice every time you wash. Columbia University researchers found that washing your hands once had a minimal effect on killing germs.
Cover your nose and mouth with a tissue when coughing or sneezing. This will help keep germs from infecting your hands. If you don’ t have a tissue, cough or sneeze into your sleeve - Centers for Disease Control.
Don't smoke. Statistics show that heavy smokers get more severe colds and more frequent ones. Even being around smoke profoundly zaps the immune system. Smoke dries out nasal passages and paralyzes cilia, the delicate hairs that line the mucous membranes in your nose and lungs that sweep cold and flu viruses out of the nasal passages - Office of Health Education, University of Pennsylvania.
Drink plenty of fluids. Water flushes your system, washing out the poisons as it rehydrates you. A typical, healthy adult needs eight 8-ounce glasses of fluids each day - Webmd.com.