Derek Sivers, the former owner of CD Baby recently wrote a book, Anything You Want, that's having a profound impact on my thinking. You might find it (mis)categorized as a business book; it's not. It's a story about life and how to live it.
Here's one anecdote that's marinating in my mind...
"Kurt Vonnegut and Joseph Heller were at a party at a billionaire's extravagant estate. Kurt said, "Wow! Look at this place! This guy has everything!" Joseph said, "Yes, but I have something he'll never have...Enough."
If you're within the first fifty people who contact me, I'll buy you the Anything You Want ebook through Amazon so long as you agree to lend it to someone else once you're finished (this ebook, purchased through Amazon, is lendable.)