The document lists various social media sites and networks for sharing content, including social news sites like Digg and Reddit, social bookmarking sites like Delicious, social networks like Facebook and MySpace, and Q&A sites like Yahoo Answers. It then provides tips for using these sites, such as building profiles, adding friends, leaving comments, customizing profiles to match sites, monitoring keywords, tweeting messages naturally and including relevant links. The document also discusses using tools to automate posting and provides dos and don'ts for content promotion on various social networks.