Cold Remedies: say bye bye cold forever Clock in Face Time

Surprise: All of your friends come with benefits. People with the most types of relationships - everything from close friends to neighbors - have a greater resistance to infectious diseases, according to Health Psychology. Conversely, that same research shows that loners' immune systems suffer. "Lonely people often have high stress levels, which can have a negative effect on the immune system," says Sheldon Cohen, Ph.D., a psychologist at Carnegie Mellon University. The exact number of friends you need to help you stay cold-free is unclear, but don't let that stop you: Set a goal of making one new connection a month, whether it's at the office, the gym, or the coffee shop.