Hospitalization in the intensive care unit can be a stressful time for patients and their family members. Patients’ family members often have difficulty processing all of the information that is given to them. Therefore, an intensive care unit diary can serve as a conduit for synthesizing information, maintaining connection with patients, and maintaining a connection with family members outside the intensive care unit. Paper intensive care unit diaries have been used outside the United States for many years. This article explores the development of an electronic intensive care unit diary using a rapid prototyping model to accelerate the process. Initial results of design testing demonstrate that it is feasible, useful, and desirable to consider the implementation of electronic intensive care unit diaries for patients at risk for post–intensive care syndrome.