Learning research tells us that the time lag from experiment to feedback is critical.

The business changes. The technology changes. The team changes. The team members change. The problem isn't change, per se, because change is going to happen; the problem, rather, is the inability to cope with change when it comes.

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

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

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

If you're having trouble succeeding, fail.

If testing costs more than not testing, then don't test.