This document discusses the 5 deadly sins of implementing SharePoint in an enterprise environment. They are: 1) treating governance as a one-time event rather than an ongoing process, 2) IT leadership not being involved in information architecture and roadmapping, 3) treating user adoption and training as an afterthought, 4) underestimating the human resource requirements, and 5) failing to educate and engage executives on how SharePoint can provide business value. The document provides additional details on each sin and recommends best practices to avoid them.