I was shooting with a good local shooter today in league and he mentioned that he talks to himself in his mind as he is aiming to "relax himself". I tried to do that but I just didn't know what to say

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He said it shouldn't be something like aim/aim/aim.
I'm usually thinking about my release hand because I am working with a new BT release and it still isn't automatic... I would welcome any mental image aside from my release hand as it can be very self-defeating.
Ideas? Input? Thoughts???
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SuperX