This document summarizes Marcy Kellar's presentation on the 10 worst mistakes in SharePoint branding. It discusses common mistakes such as using inline styles instead of CSS, allowing designers too much freedom without considering implementation costs, applying fixed widths that limit collaboration, removing elements like the quick launch that remove functionality, not designing for real content, fixing the ribbon width, using content editor web parts instead of publishing tools, modifying default SharePoint files, and directly editing SharePoint sites in Dreamweaver. Each mistake is explained, potential impacts are outlined, and fixes or workarounds are suggested. The document provides guidance on best practices for SharePoint branding.