The document describes a self-directed social media and Web 2.0 training programme called Cam23 for University of Cambridge library staff. Over the course of 12 weeks, participants will explore 23 different social media tools and technologies. For each tool, blog posts by the project team will provide instruction on what it is, how to use it, and further reading. Participants will create their own blogs to post exploratory and evaluative discussions of each tool and receive a certificate and voucher upon completion. The goal is to expose staff to new technologies, support personal and professional development, and help libraries embrace social media.