In the previous chapters, the theoretical foundations upon which the design of digital behaviors is based were presented. This chapter proposes a methodology to organize all this knowledge into a valid process for the design and development of Digital Operant Boxes, or equivalently, digital services. The aim of designing digital behaviors is the creation of behavioral blueprints of the user's potential interactions with the digital service, in such a way that reflects their personal, historical, and digital characteristics. To achieve this objective, this chapter presents a methodology “Digital Behavioral Design” which consists of two main phases with several stages in each: (1) Digital Behavior Analysis and (2) Drives and Operants Design. The Digital Behavior Analysis comprises the following stages: “Goal-Directed Behavior Design” and “Digital Behavioral Map”. This phase focuses on the molar behaviors of the user when using the digital service and allows the designer to present an initial approximation of the service’s behavioral blueprints. The second phase consists of 5 stages: “Behavioral Profiling”, “Reinforcer Matrix”, “Behavioral Competition Analysis”, “Hierarchy Map of Reinforcers”, and “Digital Blueprint”. These stages enable the designer to optimize the drives and reinforcers identified in the first phase and to finely tune the digital service. Therefore, “Digital Behavioral Design” becomes a tool for the designer of digital behaviors that will allow them to apply knowledge from behavioral and cognitive sciences to the design of digital services.