Replying to GRE's: who's taken them?

I'm looking to start the whole grad school process. I have the grades (3.97, 4.0 in my major) and am in the process of being published. I'm in my junior year and start my honors thesis work next semester and I'm guessing the next big step besides that is taking the GRE's. I have talked to a few people, but most of them were pretty arrogant, so I could have gotten some bs information. Have any of you guys taken them? anyone looking to take them? advice, warnings? I want to get into a pretty sick grad school for history, so I have to make sure I have a solid mark on the GRE.