Multitasking is a myth. Reklau instructs readers to dedicate 45-minute blocks to a single task, using a physical timer. This habit alone, he claims, can double productivity within the three-week window.
If you are looking for practical guides or summaries in PDF format, the following resources provide exercises similar to those in Reklau's books: Multitasking is a myth
: Focus on habits that have a "ripple effect" on multiple areas of life (e.g., exercise or meditation). exercise or meditation).