I pulled off a straight up miracle in 1 month. So I started studying for the GRE rather late, thinking I was gonna take the GMAT, but then changing my mind to go get my masters in international relations rather than business school. Shortly thereafter, I changed my mind again but I stayed the course when I found out the business school I wanted to go to also accepted the GRE. For the real test, I recommend 1) use the mark buttons if you can't figure out the question right away. 2) I had a hard time with verbal, but reading it several times and using process of elimination really helped me out. 3) practice tests. Do them.
Princeton Review #1: 162V 160Q
Princeton Review #2: 153V 164Q
Princeton Review #3: 159V, skipped quant, focus was on verbal
Princeton Review #4: 164V, skipped quant, focus was on verbal
Powerprep #1: 159V 164Q
Powerprep #2: 156V 166Q
Real GRE: 162V 167Q
I almost flipped out in the testing room when the score screen flashed. Good luck!
Also the portions in the Princeton Review book where they go in depth to each of the sections and explain how to tackle the questions helped.