This user's guide was developed to advance local planning at ARL member libraries. It is written for library leaders writ large and for anyone leading or contributing to research library planning processes. Users do not need advanced facilitation skills to benefit from this guide, but facilitators charged with supporting scenario planning will find the detailed designs particularly helpful. For leaders, planners, and facilitators alike, the user guide introduces the ARL (Association of Research Libraries) 2030 scenarios and explains many of the ways they can strengthen their institution's planning using the ARL 2030 Scenarios. Scenario planning is a methodology that requires substantial time and other resources to implement. ARL has supported the investments in the creation of this scenario set, and individuals and libraries can find great value even by committing a few hours to consideration of the scenarios and the strategic implications this guide includes. However, to more fully benefit from scenario planning, libraries will need to make more significant, longer-term investments to implement the advanced designs the user's guide offers. Many readers will not be prepared to implement the guide's most powerful tools themselves, as well-developed facilitation skills are required. However, leaders can use the descriptions of the tools to decide which might be used most effectively at their organization and to determine what resources are needed to initiate scenario planning or integrate it with their strategic planning program. A glossary of terms is included. (Contains 4 figures and 3 footnotes.)