The book, "How Will You Measure Your Life," by Clayton Christensen is easily on my list of Top 5 Most Important books, I cannot recommend it enough.

Interestingly, Kent seems to have focused in on hygiene-motivation factors more than anything else, while the large takeaway I brought from the book is more about relationships than money/freetime options. While it is important to be locally maximizing the balance of those two, I found the message of the book to be about focusing outward, more away from one's self and career, and more towards others in ways that you can positively effect them.

Not saying at all that the content is wrong (because it's not, it's a fun engineering way of looking at it), but for those curious it also represents a subset of the book.