I used to think in terms of methods and data structures, say about 5 years ago. I was thinking bottom up. I learned (slowly) that I could not sufficiently communicate to the business folks what was happening. Their eyes would just glaze over. They also rejected 90% of my work by the time they got to see it. We were simply out of phase with our communication.

Today I have learned to think in work flows and the visualizations of the UI. This is how the users of the program view it. To users the UI is the program. Now the users accept my work 90% of the time. I seldom think about the methods or data structures anymore until I am actually sitting there typing it in.