There is no such thing as overindulgence when it comes to the scope of academia. In the past few months , studying has intrinsically become part of my daily routine. I use to dread slaving away at the books. With the addition of espressos in my life, and the subtraction of less needed substances, my mind has becoming an ever-churning FACTory.
For play, read Plato.
For laughs, don't rely on books or the "funnies". (all the time) Try self deprecation and friendship.
Read/listen to the news. All these propagandist statements like "turn off the news, turn on music" are blueprints for a) economic disaster b) a mindless generation & c) a retrogressive society as a whole.