The Subtle Art of Not Giving a F*ck by Mark Manson, 224 pages

This little book doesn't advocate not caring about anything.  It advocates that we should pick and choose what we care about instead of being emotionally invested in every darned thing.

There's much more in the book - not all of us are special, happiness is hard work, etc.  It was a nice rah rah book.  I think if I was in my 30s and not my 50s it would have been more life changing.  Mostly, I said "yep" as I listened.  Definitely worth the time it took to listen to it.