Unlike the wildly successful server-side Java technology, the true "write once run anywhere" vision has never been achieved for client-side Java. For Java developers offering end-to-end smart client?based SOA solutions, the development process is still "write once, debug everywhere." As the client-side platforms evolve from a handful of PC OSs to hundreds of devices with different OSs and UI characteristics, developers must leverage design patterns and innovative project organizational techniques to smooth the development and optimization process. This session will introduce more than a dozen of those design patterns and organizational techniques based on Michael's experience working with Nokia developers to develop scalable mobile enterprise applications.