The book is structured around ten 'scrolls', each addressing one facet of self-improvement. Mandino instructs his readers to allocate five weeks to each of the scrolls and to read the scroll first thing each morning, a second time at the end of the work day, and a third time -- aloud -- before going to bed. This is an early (the book was published in 1972) version of what we now call neuro-linguistic programming: If you repeat the same assertions often enough, they will embed themselves in your subconscious mind.
Also at the end of each day, Mandino requires readers to complete a 'success recorder' -- a scoresheet on which to record the number of times one actually read the scroll and a numerical score to assess how well one adhered to its values.
I believe that, if you exert the discipline, dedicate the time and follow through with Mandino's programme as he specifies, you will indeed improve your life. If you simply read the book (as I did when recording it), you'll come away less impressed. This is an exercise book as much as anything else. Simply reading it is like reading a book about yoga without ever unrolling the mat.