I've said it before and I'll say it again, the holiday season can be one of the most stressful times of year. You know what adds to stress? Lack of sleep. So don't be one to fall in the trap of not getting enough sleep this holiday season. And when you are sleeping make sure that you are sleeping deeply enough so that your body is able to recover.

According to the Washington Post, an analysis of nearly 10,000 adults found that those between the ages of 32 and 49 who sleep less than seven hours a night are significantly more likely to be obese. The study also found associations with other illnesses, including several reports from the Harvard-run Nurses' Health Study that has linked insufficient or irregular sleep to increased risk for colon cancer, breast cancer, heart disease, and diabetes.

Here are four natural ways to ensure that you are hitting the pillow hard enough: