4. Get Some Sleep (for real!)
Not getting your usual amount of zzzs can also make you more prone getting sick, says Goldberg. Don’t burn yourself out now thinking you’re going to catch up after Christmas. Limit yourself to one drink at a party because while alcohol might help you fall asleep faster, it increases the chances that you’ll wake up in the middle of the night.
5. Don’t Touch Your Face So Much
Germs can’t enter your body until you touch your mouth, eyes, or nose. So try to break yourself of that unconscious habit; one study from the National Institutes of Health found that people touch their face in public more than three times an hour.