Verbal prep can be hard, but one of the better departments for preparing you to quickly take apart and understand a one to two page densely written essay is philosophy. I actually took not philosophy as an undergrad, but when friends of mine who did looked at the verbal practice problems I was struggling through, they were able to reason out the correct answer with apparent ease. Try taking an intro philosophy course that has a lot of reading and analytical writing (modern philosophy recommended, ancient philosophy classes are sometimes just history classes and do less analysis supposedly). Also, at least in theory, any class that requires you to analyse what you read, and to write well, should help the verbal and writting sections.
