Tasty! Recipe for low cognitive-load productivity

Beginning with a pedestrian item (a loaf of bread), I examine the process that is necessary to produce consistent results and eliminate variability by understanding the inputs for predictable output. I then touch on how this is echoed in GTD, iProcrastinate (Tim Pychyl), and Agile project management. The common theme across all the above is the definition of the desired result, and the break-down of the seemingly complex result into constituent steps that in themselves have little variability. It is a combination of a production-line and a chemistry experiment to produce tasty stuff.
Being that it is repeatable and can be progressively improved upon, it allows for limited experimentation by tweaking selective variables and measuring the output.