6) Think of your qualities. A lot of times, lack of confidence is a result of loosing sight of our qualities, exaggerating your flaws and because of this, thinking you’re going to do terribly. When this happens, consciously remember your qualities, especially those which are relevant in the context, and focus on them. If for example, you are delivering a speech and you know you are very organized in your speaking, think about this, and it will boost your confidence.
想想自己的好。没有信心很多时候是一味夸大自己缺点的结果。

来源:可可英语 http://www.kekenet.com/read/201002/97327.shtml