Marking Up Books

I just came across this great list of ideas for how to mark up books. If you're like me, you probably hesitate before writing in a book. I don't know what it is, but I always feel like I'm marring something precious everytime I start marking up books. The times I've done so have been great and very useful for remembering things and extracting real nuggets of knowledge out of them, but there's still something in my gut that cringes everytime I do so.

I'm making it a personal goal to try to learn to read better and faster, becoming more productive with my time with these treausres. Part of the goal of our PhD program is to turn us into reading and writing machines. I want to do everything I can to work towards this end -- even if it means marking up my books!