For most people, thinking of the top tier of raiding guilds conjures thoughts of people who do nothing but play a computer game in a dark room somewhere. In fact, this is often not the case -- time for career, family, and friends are still very much a part of their lives.
The key is in time management.
It's very well written, and is very insightful. It also has tips on how a lower tier guild can take advantage of some of the time management techniques to improve their own progress.
What players do not understand is how real a factor time is on the guild welfare as well as their own. Spending time gearing up for new content is almost never as well spent as time actually working on that content. This is especially true in the Burning Crusade, where stat differences and gear progression between Karazhan and Black Temple is relatively small; keep in mind that Nihilum cleared through Black Temple just 3 months after raiding began. Gear is good, but it is not key. [Emphasis mine]