Ten rules of 'Zero-Defect Software Development' by Steve Pavlina, CEO, Dexterity Software: http://www.dexterity.com/articles/zero-defect-software-development.htm
1. Test your product every day as you develop it, and fix defects as soon as you find them.
2. Review your code regularly.
3. Rewrite poor-quality modules.
4. Assume full responsibility for every bug.
5. Handle change effectively.
6. Rewrite all prototyping code from scratch.
7. Set QA objectives at the beginning of every project.
8. Don't rush debugging work.
9. Treat the quality of your code at the same level of importance as the quality of your product.
10. Learn from every bug; each one represents a mistake that you made.