@gpittman I agree, though David Allen clearly acknowledges the importance of the levels of perspective, he barely touches the subject in his book and courses. He basically just says that you should develop the upper levels, but does not explain how to do it.

I also think that the stacked presentation of the levels do not always help in understanding them. Humans are messy and sometimes it can be benefit ion to see, for example, the areas of focus on the same level as your goals.