Some people go for a walk to clear their heads when they are stressed out. Others choose to listen to music, meditate, play with their kids, or eat their favorite comfort food. I believe that it is important to have an outlet for stress. Of course, a healthy outlet such as exercise is better for you than maybe going out for a smoke or indulging in sweets. But ultimately, in whatever way you can, you should be able to find a way to let go of whatever stressful things bother you each day.
My outlet is crochet.