This document discusses principles for measuring social media return on investment (ROI) for nonprofits. It recommends integrating measurement into social media strategy from the beginning by setting SMART objectives. It also recommends using benchmarking to measure performance in context, tracking engagement metrics over time, considering both tangible and intangible values, and communicating and reflecting on results. The overall message is that social media measurement requires a long-term, holistic approach integrated with good social media practices and organizational culture.