The development and use of information systems in business and public organizations creates the need for vast change in the modern, global organization. The innovation and creativity these changes fuel have led to a need for information that analyzes critical aspects of IS development and use. This text reports on state-of-the-art IS/IT innovation and diffusion research and presents innovation and diffusion theory based guidelines to enable managers to take firmer control over the issues and processes that will increase the business value of IS/IT investments.