What is your mental image of yourself? Are you confident in your abilities? Are you confident you can succeed. On the last two the answer needs to be yes for the best results. For the first one, take a look in the mirror at the image that looks back. Does it project that confidence? If not you need to learn how to at least act like you are confident for the best chances. If you can look truly convincing to yourself you've probably got a great shot at what you're trying to do. After a while once you start acting confident you will feel the confidence you need to show.
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