With software this should be your test suite. No test is too simple. No feature or detail too small to test. Replace the line "relentless checklist" with "relentless testing" and you're good to go. Don't deploy before all tests are green and that's the same as not flying without running through your checklist.

I grew up flying with my dad in his Cesna 172 and admiring how well the pre-flight checklist worked. When I first heard about TDD, I immediately recognized it as the same process, except automated.