The book is in large part a quick summary of some of the author's previous books on increasing personal productivity, organizing the tricks and hacks into four categories: labor, time, knowledge, and social connections. The more valuable takeaways, though, are less about the specific recommendations (most of which are mentioned elsewhere in the self-help literature anyway), but more about the core underlying mindsets including starting from your goals and reverse engineering the steps and tasks required,automating/systemizing routine tasks and daily habits to save time and energy, and focusing on the critical 20% tasks that generate 80% of your desired results.