Reklau bases his method on the idea that habits are the compound interest of self-improvement. A small, 1% change in your daily routine repeated over 21 days does not just create a new action—it creates a new identity. The keyword here is consistency . By searching for the PDF version of this book, you are demonstrating a desire for immediacy and portability. You want to change now , and you want the tools in your pocket.
Marc Reklau leverages this timeframe not as a finish line, but as a starting block. He argues that if you can stick to a behavior for just three weeks, you prove to yourself that you have discipline. You move past the "cognitive friction"—the mental effort required to do something new—and begin to form a groove in your daily life. Reklau bases his method on the idea that