Nonsense; This guy (and others of his ilk) is just a hustler.

People seem to lose all their common sense as soon as somebody trots out easy-sounding-without-effort-for-the-price-of-a-book soothing advice to solve all their problems.

Meanwhile the real "self-help" exists in plain sight in the domains of Philosophy and Psychology coupled with an understanding of Neuroscience/Biology.

People should checkout Hindu Philosophies of Samkhya and Yoga, Buddhist Philosophies of Japanese Zen and Tibetan Lojong, Greek/Roman Stoic Philosophies of Epictetus, Seneca, Cicero, Marcus Aurelius.

On the Psychology side checkout Self-Determination Theory, Applied Behavioural Analysis and Cognitive Behavioural Therapy.

On the Neuroscience/Biology front checkout the importance of circadian rhythms/diet/exercise/sleep along with needed essential minerals/vitamins/etc.

That will give you all the information you need to devise your own workable self-help regimen.