OODA Loop: A Comprehensive Guide | Art of Manliness

I was surprised on how much effort the author put into this article. It's a good source to start and if you want to understand and use the OODA Loop.

put another way, the OODA Loop is an explicit representation of the process that human beings and organizations use to learn, grow, and thrive in a rapidly changing environment — be it in war, business, or life.