Meditation is the best way to reduce stress. Practicing it for few minutes a day is known to reduce anxiety. Taking a deep breath also relieves from stress. Deep breathing reduces the stress by lowering heart rate and blood pressure.
To relax your mind write down the things that is bothering you. This helps you to track the cause of your stress and tackle it in a better way. Concentrating on the present is another way to reduce stress. By meditating you can focus or concentrate on one thing at a time.
Stay with friends who gives you positive advices and who is is always happy and makes you happy reduces stress. Exercising helps in clearing thoughts and calming emotional intensity.