Maruca successfully used Twitter in her job hunt in part because she didn't simply rely on it to promote herself. While it's fine to share your work with others, you also need to talk to people and share links to interesting information. Twitter etiquette demands that people give and take. Schwabel, for instance, says he spends up to two hours a day retweeting other people's messages and linking to new companies, groups, or individuals. "It's social capital," he says. If you're only in it for the self-promotion, fellow tweeters will tune you out, as they would with an annoying television commercial.
via newsweek.com