Law Students often "outline" a course as a method of studying and preparing for an exam. While you can certainly do this in Word, there are several programs designed to support the sort of outlining that law students do.
Also see EverNote as another organizational tool.
For graphical learners the process of Mind Mapping can be very helpful when studying law. There are a number of software packages that support this sort of graphical "brainstorming" method of learning.
The massive amount of information that comes with law study can often be retained by the use of flashcards. Some students swear by them, others don't. But there are resources on the Web to support this mode of study.