1. Value satisfaction over happiness
2. Build good habits.
3. Commit; chop wood, carry water.
3. Surround yourself with quality people.
Books could be written on each of these lines, of course. In fact, books have been written; volumes upon volumes. Is there value in reading them? Absolutely.
But consider the story of Hillel the Elder.
When Hillel was challenged by a Gentile to explain the Torah to him as he balanced on one foot, Hillel responded:
What is hateful to you, do not do to your fellow: this is the whole Torah; the rest is commentary; go and learn.
Heal thyself, hone thyself, change the world –