I wish I could edit my comment, but it looks like HN takes away the ability after some time. What I wanted to do was to recommend everybody read two books: "Shop Class as Soulcraft" (cheesy title, I know) and "The World Beyond Your Head." Both books are my Matthew Crawford, a "knowledge worker" turned mechanic / author in Virginia.
He writes wonderfully about this whole idea of what to attend to, what to pay attention to, and how those two things end up influencing your own thoughts and feelings. He's far more articulate and in-depth about this "phenomenon"--how social media is, in a way, dethroning your usual mental faculties.