Integrate Often XP and Databases. Integration can be reduced to seconds. It may not be as slow as you think. Well worth the investment . Could have saved us some time .
Testing first makes the code testable.
They give a feeling of stability . Create a tool to maintain them. If you have a story to tell about something that saved you time please send it in. If you have a story about what doesn't work send that too. Please write a lesson learned about an XP practice and send it to the webmaster.