I especially like the Next 5 Years exercise. It’s long enough that you can really see how you can move towards your goals, but it’s short enough that it is imaginable what those years could hold. Doing different versions of the five years that optimized for different factors (maximizing goal achievement, maximizing realistic achievability, focusing just on art, etc) helped to triangulate where my priorities should be.
An important point of the book was to identify unsolvable problems, and to figure out how to work around them and to not fight them. This was also quite useful because it emphasized the need to understand when a problem is part of the environment and not something that is worth your mental energy. They call these Gravity Problems.