Sly Flourish's Return of the Lazy Dungeon Master (2018)

From the introduction:

Return of the Lazy Dungeon Master is a book designed to help Gamemasters of any type of tabletop roleplaying game—both veterans and newcomers alike—get the most value out of the time we spend preparing for our games. The ideas in this book are based on reviews of hundreds of videos, articles, books, and interviews, as well as the shared experiences of thousands of DMs and GMs. Return of the Lazy Dungeon Master begins with an eight-step process for game preparation, then builds on those steps to expand into a full discussion of how we prepare our games, how we run our games, and how we think about our games.