When you register, you get some kind of free prep program downloadable from the ETS website. It has three sets of practice problems for every section and two practice tests, along with a bunch of sample essays with the scoring and comments. Those were incredibly helpful as far as knowing what they were looking for in a response. I worked my way through all of those, did the Kaplan math review book, and did the verbal section in Barron's, starting about a month before the test for about an hour every couple of night. 730V/790Q/6A, but I tend to do standardized tests very well (1510 SAT), so a prep course might be better for some. I did it for the SAT and I don't know how much impact it actually had on my score, but I found it to be a waste of time and money and didn't do it for the GRE. I don't really think you need it.