How do you relieve your stress?

Many people get stress for a lot of different reasons. I'm getting stress because of the study for the teacher's exam nowadays. I usually listen to music to get the stress away, but it doesn't always work. Then I try to see something in a different way, more positively if it is what gives me stress. However, it doesn't work all the time either. The stress tends to go down as time goes by, but is there any effective way to relieve the stress very quickly? It might be a temporary solution if the main source of the stress still exists. Nevertheless, this kind of solution still helps me to refresh myself, so I can face the problem more energetically. How do you get your stress away?