2) Breathe. When you feel insecure, it manifests itself in your physiology and especially in your breathing, which becomes faster and shallower. Your emotions impact your physiology, but it can also work the other way. Focus on your breathing: first notice it, then start to consciously breathe deeper, slower, and more regular. As you do this, you will quickly notice your negative emotions dropping and you will feel more confident.
深呼吸。當你沒有把握的時候，可以通過自己的心里和呼吸感受得到，你的心情影響你的生理，所以，調整你的呼吸是個好的辦法。

來源:可可英語 http://www.ccdyzl.cn/read/201002/97327.shtml