This document discusses blogs, wikis, and other professional development tools. It explains that blogs allow one to share opinions and journal, wikis enable collaboration and sharing ideas, and social networks like RSS, Twitter, Ning and Facebook help connect and interact with others. It provides overviews of how blogs and wikis work and compares their best uses. It also outlines some social networks and how they function, as well as some cautions to keep in mind when using online professional tools.