How do you decide what to tweet

I tweet at least once a day and my goal is to have each of my tweets fall into one or more of these 4 categories (ICEE):Inspire, Connect,Entertain, or Educate—all of which I believe are somehow related to happiness.

【微博原则：ICEE】美国著名电商Zappos CEO Tony Hsieh说：发微博的原则应该是ICEE。I = inspire（启发得到灵感），C= connect（连接增进感情），E = Entertain（娱乐带来快乐），E = Educate（教育辅助成长）。如果一条微博不能达到这四个目的之一，那就不发也罢。

【英文原文】http://mashable.com/2010/04/12/zappos-interview/