The Subtle Art of Not Giving a F*ck: A Counterintuitive Approach to Living a Good Life by Mark Manson
The title is more shocking than the book actually is. The book is basically about asking yourself questions about your life, deciding how you want to spend your time, and figuring out how you are going to measure your standard of success. And to not care about the rest.
I think a lot of people could benefit from reading this book and actually thinking about why they are pursuing the things they pursue.