Hi, I thought you may like this Mentalrobics exercise from Braingle.com:
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Fail Early to Succeed Quickly

Don't be afraid to fail at something. Whenever we attempt something and fail, we end up learning something about the process and come away from the experience with a better understanding of the problem. Subsequent trials will come closer and closer to success. Plan on making multiple early prototypes or attempts with the understanding that they are not the final solution. This "hands-on" experience is one of the quickest ways to learn the details of the problem.
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For more mind exercises: http://www.braingle.com/mind/