This chapter presents an overview of eye movement desensitization and reprocessing (EMDR), a research-validated treatment for posttraumatic stress disorder (PTSD), and a related set of procedures known as resource development and installation (RDI), which have been reported to be useful in ego strengthening and stabilization. First, the extant research on EMDR, its theoretical model, and the eight phases of its treatment will be sumarized. The principles and theoretical foundations of RDI will then be discussed. Two cases will be presented. The first case illustrates a simple application of resource development and installation to supplement the standard EMDR PTSD protocol in the brief treatment of a marital crisis. The second case summarizes the brief, strategic use of RDI to stabilize a patient with complex PTSD who was referred for collaborative treatment and to build a foundation for comprehensive EMDR treatment.