Airborne Laser Scanning data—also known as Light Detection and Ranging (LiDAR)—enables the accurate three-dimensional characterization of vertical forest structure. Airborne Laser Scanning data have proven to be an information-rich asset for forest managers, enabling the generation of highly detailed digital elevation models and the estimation of a range of forest inventory attributes (e.g., height, basal area, and volume). Good practice guidance synthesizes current knowledge from the scientific literature and practical experience to provide non-experts more detailed information about complex topics. With this guide, our goal is to inform and enable readers interested in using Airborne Laser Scanning data to characterize, in an operational forest inventory context, large forest areas in a cost-effective manner.