In summary ...

1. There is a difference between planning for the outing and thinking as you takes a shot

2. There is an important role for 'instinctive'

3. Experience allows the thinking process to get easier
(a bit like driving a car - you focus on where you are going more than how to get there (gears, accelerator, brakes etc))

4. Thinking about the results (composition, lines, exposure etc) is more important than the specific camera settings