I tell people to start implementing when they are pretty sure there aren't more important stories out there. An iteration's worth of data is worth months of speculation.

A plan is an example of what could happen, not a prediction of what will happen.

The community isn't nearly as afraid as it thinks it is.

I've known people who have not mastered their tools who are good programmers, but not a tool master who remained a mediocre programmer.

Optimism is an occupational hazard of programming; feedback is the treatment.

Responsible Development shares many practices with XP but the roots are different. Responsible Development's values are honesty, transparency, accountability and responsibility. These lead me to pairing, test-first, incremental design, continuous integration and so on because they support the values.

Listening, Testing, Coding, Designing. That's all there is to software. Anyone who tells you different is selling something.