What separates the merely organized from the genuinely productive is the *discipline of closure*—planning isn't really about knowing what to do, but about committing to a finite list so your mind can stop generating alternatives and start executing. Thatcher, for all her polarizing politics, understood that the gap between intention and results lives in this gap between planning and the actual work of following through. Notice she doesn't say "make the best plan" but insists on the humble daily rhythm, which means accepting that perfection is the enemy of progress. A surgeon I know keeps a three-item list each morning and refuses to add to it; when tempted by a fourth task, she asks herself which of the three she'd skip instead—and almost never does.