The effective executive does not, in other words, truly commit himself beyond the one task he concentrates on right now. Then he reviews the situation and picks the next one task that now comes first.
Pomodoro + personal kanban is a good way to make this happen. Pomodoro for focus on the actual thing you're doing right now; kanban for the next level up.
This passage also describes a sort of slow motion OODA loop. Kanban helps with that by giving you a visual map of your options. WIP limits help enforce the one thing at a time principle by narrowing choices to begin with. WIP limit of 1 may be tempting, but that probably leads to a lot of down time in real life since some tasks have built-in waiting periods (ex. HPLC).
