The “larger questions” often can’t be tackled at work, because creativity and critical thinking require uninterrupted focus – like going for a walk or sitting quietly on a couch by yourself. Or a bike ride. Or talking to someone outside your field.

Here’s the other problem with Facebook and Twitter and even The New York Times. When you expose yourself to those things, especially in the constant way that people do now—older people as well as younger people—you are continuously bombarding yourself with a stream of other people’s thoughts. You are marinating yourself in the conventional wisdom. ... See more