1. Be grateful – Some study participants were asked to write letters of gratitude to people who had helped them in some way. The study found that these people reported a lasting increase in happiness – over weeks and even months – after implementing the habit. What's even more surprising: Sending the letter is not necessary. Even when people wrote letters but never delivered them to the addressee, they still reported feeling better afterwards.
充滿感激。有研究表明，每天心存感恩的人比一般的人要快樂很多，即使這些感恩的話不說出來，寫下來也可以。

來源:可可英語 http://www.ccdyzl.cn/read/201003/98052.shtml