Agile Testing: A Practical Guide for Testers and Agile Teams

seven key factors for successful agile testing:
1. Use the whole-team approach.
2. Adopt an agile testing mind-set.
3. Automate regression testing.
4. Provide and obtain feedback.
5. Build a foundation of core practices.
6. Collaborate with customers.
7. Look at the big picture.

The principles we think are important for an agile tester are:
Provide Continuous Feedback.
Deliver Value to the Customer.
Enable Face-to-Face Communication.
Have Courage.
Keep It Simple.
Practice Continuous Improvement.
Respond to Change.
Self-Organize.
Focus on People.
Enjoy.

Without the attitude, the skill is nothing.