My grandpa once advised me to read a new book or magazine about something I was unfamiliar with every month. Terrific advice, I have so much more general knowledge that lets me interact with customers and new people than many of my peers.
Every single time I go into a doctor's office or a waiting room I look for a Smithsonian Magazine, because of how well it's written and the random cross section of articles.
I literally just went and subscribed... personally I think I need to "get out of my comfort zone" more and stop reading just tech news and scifi.
In a way reading HN feels like I'm crashing a vascular conference.