- Do one thing at a time / Ah desire to keep the doors open
- Know the problem / No happy ending
- Learn to listen / Best thing I do
- Learn to ask questions / Very related to the ability of writing good tests
- Distinguish sense from nonsense / Don't be involved in the discussion of editors, instead find the optimal customization of your editor
- Accept change as inevitable / The only thing doesn't change is change
- Admit mistakes / Prepare interrupt handler
- Say it simple / KISS and DRY
- Be calm / Do your work
- Smile / Not only smile, kiss and give a hug, too.
-- PF&DW 1991