Hi, I thought you may like this Mentalrobics exercise from Braingle.com:
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Anxiety

Many people use the words 'anxiety' and 'stress' interchangeably, and although they are related, they do not mean the same thing. Anxiety is a feeling of fear or apprehension about future uncertainties, which may contain unknown dangers. Anxiety can cause sweating, heart palpitations, nausea, chest pain, shortness of breath or trembling.

Stress [ For more on 'Stress' go here: http://www.braingle.com/mind/534.html ] is a larger term that includes anxiety as well as feelings of frustration, anger or nervousness. Stress and anxiety are highly personal things. What makes one person feel stressed or anxious may not make someone else feel the same way.

Anxiety disorders are strong cases that have a serious negative impact on a person's life. Some common anxiety disorders are phobias, obsessive-compulsive disorder, post-traumatic stress disorder [ For more on 'post-traumatic stress disorder' go here: http://www.braingle.com/mind/630.html ] and social anxiety disorder. For many of these conditions there are drugs or treatments that are effective.
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For more mind exercises: http://www.braingle.com/mind/