Nobody had run a mile in under four minutes, and then somebody did, and within a few years a dozen more had followed. Mickey and Caitlin Russo use that to argue that the barrier was never physical, and the argument sets up most of what else they write.
They spent three months living in Costa Rica and the posts from there are the best. Friends gave them a card warning them about the monkeys, which they thought was a joke until the howling started and they could not identify what was making it.
The practical run is a bootcamp broken into days: the commitments to make first, how visitors actually reach a site, free methods, then offline ones. There is also a short piece on getting a burst of visitors in a day, and a curious one on selling by giving the prospect room to say no.
Faith runs through the whole thing without ever being separated out.
Thirty six posts. Start with the four minute mile piece and then read the Costa Rica ones for the people writing.