This is what I used to review for the verbal section...(i think i posted this before, oh well).
1) Top 500 GRE Words ($12 at your local bookstore, make flash cards, or pay a few dollars more and they come as flash cards).
2) Read "The Economist" and WSJ.
3) Study a Latin-based language, or take Latin if you have time.
4) Read classic literature from the 18th and 19th century with a dictionary nearby.
Read read read read! That's how you pick up vocabulary, and use it in your day to day conversations. Studying prefixes/suffixes won't do you any good as you'll forget these at test time, and verbal is NOT about memorization of anything. It's about being able to tap into your linguistic capability on the fly, which does take months/years to build up.
Knowing the straight definitions of things helps, but more than anything, you'll need to know the subtle relationships between words.
Simple example I just made up: Soluble
paque:
recipitate: ?
a) clouded
b) clear
c) rugged
d) oxidation
You probably know the definition of each of those words, so the potential difficulty is in the relationship between them. The answer is B. Why? Well, if something is soluble, it mixes well in a solution, making it appear CLEAR. Well, clear is the opposite of opaque, so soluble and opaque have the opposite relationship. When something precipitates out, it becomes visible, and since the relationship in the first analogy is opposite, therefore the answer must be clear.
When you read these analogies, you shouldn't be reading them as individual words, you should be reading them in your head like "Soluble results in opaque...no, that's wrong...soluble solution does NOT result in an opaque substance." Take the operative "does NOT result in" and substitute it in the 2nd analogy such that "precipitate in solution does NOT result in..." and your answer will be CLEAR.
Still, this advice is predicated on the fact that you know the definition of the words. I didn't know every definition of each word on the test specifically, and thankfully you don't need to. Simply having a vague idea what a word means will suffice. This is where reading comes in, since you won't pick up definitions per se, but you'll be reading them in context which provides enough for this test.
