While some of this is of little or no use, most of the suggestions are very good.
I have read lots of martial arts books by different authors, and there is no doubt that Loren Christensen's books are the best for giving no-nonsense approaches that are both original and useful. This book is no exception to that. As a matter of fact, I'd venture to say that it's probably Christensen's best. It has a lot of excellent ideas about training alone, as well as hundreds of practical exercises. Some of the techniques he discusses are easy enough that you can practice then here and there throughout the day, while others will leave you drenched in sweat.
I'm particularly impressed with the practical approaches to street defense, such as the section entitled "9 Ways to Attack & Defend from the I-Don't-Want-To-Fight Stance" and "5 Everyday Fighting 'Stances'". The book also includes numerous workout routines that will probably keep me busy for a long time since they're definitely unique - a good break from the normal routine.
This book is well worth the money. Easily five stars!