Though the contexts may vary from those cloaked in spiritualism with suggestions of meals with a Buddah to those that guide you to a state of mindfulness, the essence of self-help books seems to be very much the same.
And yet you are in search of happiness, are you not? Have you discovered it?
The chances are that you have not. The chances are that you have already come to believe that happiness is unattainable. But men have attained it. And they have attained it by realising that happiness does not spring from the procuring of physical or mental pleasure, but from the development of reason and the adjustment of conduct to principles.
That's what struck me when I read the really short book, How to Live on Twenty-Four Hours a Day by Arnold Bennett with a copyright date of 1910. The author consciously references other book titles that say "How to live on X amount a day" to emphasize the point that time is money and even more precious and more evenly distributed than currency. I took a copy out from the library, but you can read the entire text online for free from the Gutenberg project here.