Exercise is the best relief from stress. I do agree that pouring water on your head might distract you. Another key to reducing stress is to figure out what is causing the stress and try to lessen or eliminate that something.
If the stressful situation would be anything like Columbine, Virginia Tech, or the theater shooting, then students' stress comes in many forms. Emotionally, the students need to talk to someone who can help them understand the anguish they are feeling. Allowing them to vent their emotions so that they do not well up enables the students to externalize rather than internalize their anger, frustration, and sadness.
In addition, the parental involvement emphasizes to the students that their lives will go on, and the adults in their lives are there for them. Again, letting the students talk and just listening is a stress reliever in itself. The adult reaction to the unimagineable situation will determine the relief that the teenagers experience.
Structure and returning to as much normalcy as possible allows the student to grieve but within a safe place. Everyone involved in the situation must go through the grieving process. If not, then many times he will become "stuck" in one of the stages of grief...particularly anger.
Helping the student to realize that there are no easy answers to his questions of "why" or "what" or "if." No one can fix these situations, but the counseling and listening can help everyone to open lines of communication.
You can reduce stress on students by making expectations clear. When students know what they are expected to do they tend to be more confident. You can also reduce stress by responding calmly to their questions.
Stress relief comes in many forms. I do avoid caffeine, smoking and alcohol for medical reasons. For me, I use walking, reading, yoga and some strength training for help. Really deep breaths with me blowing out as hard as I can is also helpful. Several odd things I use are buying big marshmallows, allowing them to go stale so they aren't sticky, and using them to throw against a wall. The noise is quite satisfactory, I can throw as hard as I want, and they don't break a thing. Another is either pounding my pillow or petting my cat. Both help me as do those squeeze balls from a store. As for students, I told my students to break any big project into smaller pieces with a deadline for each piece. I think it's a fine line between breaking a project into smaller pieces which feel doable and too many pieces which looks too overwhelming just by the number of pieces. Whatever you do, make sure that you find something as stress is too hard on your body not to find a solution.
Stress relievers are definitely exercise, avoiding caffeine and alcohol and doing something else to distract you from feeling stressed. Getting involved in a game like chess is a great way to think about something other than the daily stressors in one's life. Taking deep breaths and meditating are also excellent stress relievers. Playing a game of basketball, tennis or whatever sport you like is a great stress reducer. Making sure you get enough sleep every day is important for your health and well-being. If something seems too overwhelming, look at one small thing you can accomplish and then, go on to the next thing. Don't worry if you can't do everything all at once. After all, we are just human.
I find that physical activity is the best stress relief. If I'm feeling overwhelmed and can't quite wrap my head around a problem, breaking a sweat usually helps me clear my mind and feel more ready to tackle whatever problem or stressful situation I'm facing.
Sometimes, relieving stress is a matter of taking one's mind off of whatever is happening. Usually, when we can take our mind off of it, we get a better perspective and realize that maybe things aren't as bad as we thought, or the new perspective can help us see different ways of dealing with the issue at hand. Reading a book always helps me to get my mind off of things. Talking to a loved one also helps, even if you're not talking about the problem you're having.
If someone is stressed about, say school work or an overwhelming task, it helps to do little things to start tackling that work. I've always found making a to-do list helps. I write down every little thing that I need to do, even if it includes washing the dishes or sending an email. The more I can cross off (even little things), the better I usually feel.
To relief from stress,
Go to the bathroom and pour cool water in your head.
You will be reliefed from stress.