People tend to communicate just as much about how they're really feeling through body language as anything else, so if you want to come across as friendly and confident, these look like good tips.

人们交流的时候应该尽可能多的使用肢体语言，所以如果你想让人们觉得你友好而自信，那18种方法看上去是不错的小贴士。

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"Every athlete I talked to have said they perform better when they feel confident about how they look, so I really tried to do that, " said McCartney.

CNN: July 26, 2012 -- Updated 1350 GMT (2150 HKT)