How about a quick resume ?In the Reddit thread more people mentioned Grethcen Rubin's books and podcast. Specially The Four Tendencies:
“The Four Tendencies will immediately improve every area of your life—and I say this from personal experience. If you’ve been feeling stuck in your relationships, career, health, or self-confidence, understanding your Tendency and how to make it work for you is the game-changer you’ve been looking for.”
"Gretchen Rubin is one of the most thought-provoking and influential writers on the linked subjects of habits, happiness, and human nature. She's the author of many books, including the blockbuster New York Times bestsellers, Better Than Before and The Happiness Project. "
Most books can be condensed into A4 sheet quite easily.

