<a href="http://www.nytimes.com/2008/06/29/jobs/29pre.html?ex=1372564800&en=d0b5f72d73e9a742&ei=5124&partner=permalink&exprod=permalink"> Luis Suarez of I.B.M</a>., With the help of social networking tools, he has cut down sharply on his daily e-mail. "I stopped using e-mail most of the time. I quickly realized that the more messages you answer, the more messages you generate in return. It becomes a vicious cycle. By trying hard to stop the cycle, I cut the number of e-mails that I receive by 80 percent in a single week."