Putting a new feature into a program is important, but refactoring so new features can be added in the future is equally important. The ability to do… - Ward Cunningham

It was a turning point in my programming career when I realized that I didn't have to win every argument. I'd be talking about code with someone, and I'd say, "I think the best way to do it is A." And they'd say, "I think the best way to do it is B. I'd say, "Well no, it's really A." And they'd say, "Well, we want to do B." It was a turning point for me when I could say, "Fine. Do B. It's not going to hurt us that much if I'm wrong. It's not going to hurt us that much if I'm right and you do B, because, we can correct mistakes. So lets find out if it's a mistake."

Discussion groups tend to keep covering the same ground over and over again, because people forget what was said before. I think the invention of the Frequently Asked Questions, the FAQ, was a response to that. A lot of times just reading the FAQ is more valuable than joining the discussion group.

Wiki pages are very much free form. Across the whole wiki there is a hypertext structure, but on a given page, within the versatility of your command of your natural language, you can say whatever needs to be said.