When he was only 21 years old, in 1916, Henry Hazlitt wrote Thinking as a Science --- a still-fascinating book about learning, problem-solving, writing, and generally building a better life as an intelligent human creature. Among Hazlitt's suggestions for further study are several fun little works, including:
Later Bennett books (e.g., Self and Self Management (1918), How To Make the Best of Life (1923), and The Human Machine (1925)) are similarly thoughtful and inspirational. A selection of Arnold Bennett's essays appear together in one volume titled How to Live (along with Friendship and Happiness (1905); see BennettOnLife, BennettOnStoicism, ChristmasFaith, DearDiary, HumanNature, PersonalEnergy, and ZhurnalAnniversary2).
All of these books are available from online auctions and used-booksellers at embarrassingly low prices compared to the cost of current bestselling fluff. Some are free for the downloading.
Hazlitt concludes his new (1969) epilogue to Thinking as a Science:
The present generation has been privileged beyond all others in acquiring this great intellectual heritage. It is a cardinal sin for any individual to neglect to acquire at least some small part of it for himself. It is more than a sin; it is a folly. It is a failure to take advantage of one of the greatest sources of human enjoyment.