The difficulty in improving a verbal score, especially one that is already reasonably strong, is identifying trends. Just learning question by question will not do it. You need to understand what type of error you are consistently making. One technique that Kaplan recommends is an error log. Go over every test, question by question, and note the source of your errors. You should see a pattern developing with one or two error types showing up repeatedly. You can then focus on understanding that type and so "fix" several questions at once.

One problem I notice with my students is a tendency to only go over those questions they got wrong. They often say - "I knew it was A or D, but every time I guess I get it wrong." In fact, they are not going over the ones that they guessed but got right. Be sure when you take a test that you note those of which you are unsure and check them over later - even if you got them right. The fact that you were unsure says you don't know why you got them right and so cannot recreate that correct answer.

Another technique that sometimes helps is going over a practice test and putting down all the right answers BEFORE reading the questions. Then go back over the test, starting with the right answers and try to explain why they are right without looking at the explanations. This backward approach can sharpen your ability to explain, and therefore to understand, the rules.