Wash your hands often. 
Most cold and flu viruses are spread by direct contact, and the germs can live on hands for hours.  Scrub the backs of your hands, between your fingers, and under your nails for at least 20 seconds.

Sneeze into your sleeve. 
When you feel a sneeze or cough coming and you don’t have a tissue, cough or sneeze into the inside of your elbow.  Avoid covering your sneezes and coughs with your hands.

Keep your environment clean. 
Clean any surface that gets touched often—like keyboards, phones, light switches, and doorknobs—with antiseptic wipes.

Don’t touch your face. 
Cold and flu viruses enter your body through the eyes, nose, and mouth.  Besides keeping your hands off of your face, keep them off of your food too.  During cold and flu season, swap sandwiches and other handheld foods for foods that require a spoon or a fork.