Last weekend I attended the Northern Light Workshop in Stockholm. There I learned a ton about how to develop my images further in two intense days of painting and listening to the combined wisdom and experience of Justin Gerard, Jesper Ejsing and Petar Meseldzija (not to mention all the talented students!).
One of the most important things I learned during the course was about how to plan your images from sketch to finish. Doing studies of the details before applying them to the final image. These sketches are a direct result of this.