Studying for the GRE's

I'm taking a GRE class, which I payed out the ass for. But I need to learn words. I'm ok at the math, I just make idiot mistakes. So I'm thinking I should make a list of words to learn each week or something, the guy says to learn 5 a day, I feel like that's preposterous, and I've tried to learn lots of words, know them for a while, and then forget them, like canard. I forgot that the other day, but I did know it a month ago. (GRE studying has been a long process). That's my thought for the night, I should get some sleep though work in the morning. Have to talk about that later too.