In a world of too many big rocks, it’s the moderately appealing ones—the fairly interesting job opportunity, the semi-enjoyable friendship—on which a finite life can come to grief. It’s a self-help cliché that most of us need to get better at learning to say no. But as the writer Elizabeth Gilbert points out, it’s all too easy to assume that this merely entails finding the courage to decline various tedious things you never wanted to do in the first place. In fact, she explains, “it’s much harder than that. You need to learn how to start saying no to things you do want to do, with the recognition that you have only one life.”

— Four thousand weeks : time management for mortals by Oliver Burkeman