Hi, I thought you may like this Mentalrobics exercise from Braingle.com:
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Pavlovian De-stressor

Similar to how Pavlov's dog [ For more on 'Pavlov's dog' go here: http://www.braingle.com/mind/332.html ] had associated food with the sound of a bell, it's possible to program your mind to associate some stimuli with being in a relaxed and calm state. This can be a very effect way of coping with stress [ For more on 'stress' go here: http://www.braingle.com/mind/534.html ].

The first step is to find a trigger that you can use on yourself. It should be something that doesn't happen in a normal day. Maybe it could be sticking a finger in your ear, pinching the back of your hand, or taking a whiff from one of your scent canisters [ For more on 'scent canisters' go here: http://www.braingle.com/mind/378.html ].

The second step is to associate this trigger with the state of being calm and relaxed. Try to conjure up a vivid memory [ For more on 'vivid memory' go here: http://www.braingle.com/mind/490.html ] of a time in the past when you were totally at peace. Try to recreate all the sounds, smells and images. Once you think you have a good visualization, program it into your mind by sticking your finger in your ear, or whatever else you have chosen to be your trigger. In the future, whenever you are naturally feeling calm and relaxed you should reinforce your trigger by doing it.

Now that you have programmed your mind to associate the trigger with a relaxed state, you can use it whenever you feel stressed. Simply activate your trigger and you will immediately start feeling more relaxed.
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For more mind exercises: http://www.braingle.com/mind/