This document provides tips and strategies for advocating for libraries using impactful data. It discusses that advocacy is different than public relations or marketing and involves supporting an issue over time. The key is to start with why libraries are important and sell ideas by positioning yourself as a trusted advisor. It's important to identify who needs to be advocated to, manage your personal brand, and have compelling stories and data about the library's community impact. Overall messaging should be memorable and action-oriented to gain support.