Collection care is a fundamental responsibility for museums and other collecting institutions, and the foundation of collection stewardship is good collection management policies. The new third edition of _Things Great and Small_ continues to be a comprehensive resource for developing, implementing, and revising collection management policies and includes new information for addressing prolonged or permanent closure of museums, wider parameters for collection storage environments, and sustainable collection management practices to cope with climate change. Drawing on more than 50 years of experience as a collection manager, educator, consultant, and AAM Museum Assessment Program peer reviewer, John E. Simmons reviews the most recent collection management thinking and literature, helps determine which policies an institution needs, and provides guidance on policy content. In this new edition, coverage of critical areas is expanded, including digital objects, intellectual property rights, deaccessioning, decolonization, standards and best practices, collection storage environment parameters, managing off-site storage facilities, health and safety, laws and regulations, risk management, and sustainable collection management practices. With more than 50 tables and charts and model policy templates, this major publication is aimed at museums of all kinds, historic houses and sites, and other collecting institutions.