I can see the value in that, but I prefer a quantity over quality approach. When learning a new topic, I read as many materials about it as I possibly can. I don't worry too much about grasping it fully right away. I'll just survey as much land as possible. In the end, I have a much broader appreciation for a topic and have crystalized a far more sophisticated view of it. I also find that when I return to the earlier materials I read, they are much easier to understand.

I don't have time to print things...