The concepts of planning and assessment are intrinsically linked-and understanding them is essential for raising the library's profile and strengthening its position among stakeholders and the community. Even if you're an LIS student or are new to the profession, or if planning or assessment are not your primary areas of responsibility, you still have a role to play in the success of organizational efforts. With an author with more than a decade of experience in planning and assessment initiatives and instruction, and another who was her institution's first assessment librarian, this primer draws from theory, research, and their first-hand observations to illuminate such topics as: characteristics of bad planning strategy that can help to illustrate a better approach; reasons why using economic models, like ROI, fall short; how to mix the three types of planning; guidelines to ensure that assessment is meaningful and actionable; tips for creating effective surveys; emphasizing users' needs with a critical assessment framework; data analysis for surveys, interviews, focus groups, and observation; four questions to ask about audience level before you develop a report; a sample 3-year assessment plan that can be customized; and seven steps for developing a culture of ongoing assessment.