Best way to prep for the GMAT?

[BeL0wMe]

Hey, I'm going to be taking the GMATs some time before 2008, and was just curious which would be the best way to go about prepping. I'm apparently at a big advantage since I just took the LSAT and did pretty well, since Logic Reasoning and Reading Comp are also two huge parts of the GMAT.

Any other prep books that are especially good? Like I would never have heard of Testmasters/ Powerscore without this site, so any help I would greatly appreciate.