The theory on my part is to read; reading is the answer. Read anything that you can get your hands on. I would try to make sure that the author has something to say. Take a wide selection of authors: old, new, prose, poets, novels, epics, and all that stuff. ..Think about it and find something to talk about.
When I was an undergraduate at Princeton, freshman year, first term, I ended up in the course on Plato's Republic. That book just captivated me - not because of the answers, and the answers can be somewhat unsatisfying, but because of the questions, the way you went at it, the methods, the kinds of questions you could ask, the different answers you could get. That's why I'm still fascinated by that book.
I feel I can't teach you anything, what I can do is organize some material that may seem wildly complex when you first take a look at it. I've been working at it for such a long time I can at least organize it. So you can go home and teach yourself how to get control of it... I could throw an act, I can tell jokes and try to be stimulating, I can organize the books. If you don't want to do it, I can't do anything about it.