Essentialism: The Disciplined Pursuit of Less

I'm only through the first chapter. Might be a good read, but harder to implement. So far it's, you gotta say no to things that aren't important. How often has your boss asked you to do unimportant things, and would you be able to say no to any of them? Maybe try to push it off to someone else... But to say no would be harder.

Thank you!