I use color-coding when I read cases. You can use highlighters or just a multi-color pen (I use the pen). Whenever I see anything pertinent in the facts, I underline in blue. I use green for any law cited, red for the court's reasoning and black for anything procedural that I am interested in. If there is an idea I want to jot down in the book, I use whatever color that corresponds to that section. It sounds a little silly and sometimes looks like your book is a rainbow, but for some reason, it helps me focus on a particular area (law versus reasoning). It is also useful in class when you are trying to find a particular area quickly. The biggest reason I do it is because I am interacting with the material rather than passively reading. It helps me so I still do it.