Look around. Is there something you can change or control in the situation?
Learn how to relax. Meditation and breathing exercises are effective in controlling stress. Clear your mind of disturbing thoughts.
Remove yourself from the stress. Give yourself a break if only for a few moments daily.
Set realistic goals. Reduce the number of events going on in your life.
Don't sweat the small stuff. Prioritize a few truly important things and let the rest slide.
Don't overwhelm yourself. Handle each task as it comes, or selectively deal with matters.
Selectively change the way you react. Focus on one troublesome thing and manage your reactions.
Change the way you see things. Recognize stress for what it is, increase your body's feedback, and make stress self-regulating.
Avoid extreme reactions. React appropriately to the situation.
Do something for others. Get your mind off yourself.
Get enough sleep. Lack of rest just aggravates stress.
Work off stress. Do something requiring physical activity.
Avoid self-medication or escape. Alcohol and drugs mask stress;
they don't help deal with the problems.
Develop a thick skin. The bottom line of stress management is
"I upset myself."
Try to "use" stress. If you can't fight or flee from it, flow with it, and try to use it in a productive way.
Try to be positive. Give yourself messages as to how well you can cope rather than how horrible everything is going to be.
Most importantly, if stress is putting you in an unmanageable state or interfering with your schoolwork, social and/or work life, seek professional help.