"A lack of rest is why many of us are moody and irritable so much of the time. A lack of rest is why some of us stay anxious, worried, and totally stressed out far more than we should. (Everything from the common cold and headaches to obesity, asthma, diabetes, depression, and even Alzheimer's are directly related to stress, by the way.)"

What To Do When You Don't Know How To Chill Out - xoNecole: Women's Interest, Love, Wellness, Beauty

I found this by Googling "I don't know how to chill"