Another awesome excerpt from that lecture i’m reading - Mike & Doug, I especially think you should look at this:

You must have some completely concrete vision of what you would like, and therefore I’m making a serious proposition that everybody who goes into college should as an entrance examination have the task of writing an essay on his idea of heaven, in which he is asked to be absolutely specific. He is not allowed, for example, to say ‘I would like to have a very beautiful girl to live with.’ What do you mean by a beautiful girl? Exactly how, and in what way? Specifically. You know, down to the last wiggle of the hips, and down to every kind of expression of character and socialbility and her interests and all. Be specific! And about everything like that. ‘I would like a beautiful house to live in.’ Just what exactly do you mean by a beautiful house? Well you’ve suddenly got to study architecture. You see, and finally, this preliminary essay on ‘My Idea of Heaven’ turns into his doctoral dissertation.