I feel like vocab is such a crapshoot, honestly. I have a very broad vocabulary already and learned 300-400 new words from the 2011 Cracking the GRE (before it changed) and Baron's flashcards. There were almost a thousand total, most of which I already knew so I was mainly worried about math. I ended up getting a 700 quant without much studying on that end. As far as the verbal, I had all of those hundreds of new words down pat through brightly colored flashcards (they help by the way!). I think 1-2 were on on the test and most of the others I'd never seen in my life. I got a 570 V and was so mad. I swear I just had really bad luck/ crazy hard words. I guess we'll see when I retake though. So now I'm going overboard on learning new words. Anyway, my whole point was I downloaded this $5 GRE Vocab app from brainscape and it has about 850 GRE words and 300 roots. Really helpful. Just learn as many words as you can. I've heard math is easier to improve. I suggest just doing powerprep and getting as much practice as you can. You'll notice a pattern with the material. I liked Cracking the GRE. I also have 1,014 Practice Questions for the new GRE, which is helpful, but I feel like the math is kind of overkill. Don't waste your money on the official book or whatever it's called... spent $30 and all the stuff, including powerprep is on the sign. Sign up for a Kaplan test if you can.