everything you wanted to know about proofing
http://www.clickertraining.com/node/2279
300 peck method
http://www.clickertraining.com/node/1557
http://www.clickertraining.com/taxonomy/term/579/9
Why Placebos work:
http://online.wsj.com/article/SB10001424052970204720204577128873886471982.html
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