I suggest that you don't start studying until about 9 months before the exam. There are only a limited amount of pertinant study material, and you don't want to exhaust it before the test. Also, in 2 years, they might even add a scored writing section and who knows what.
But hang around the forums and pickup bits and pieces- so far what I've heard is that the Powerscore and Testmasters prep classes are alot better than Kaplan and PR. My personal opinions is that you should invest the money in the LSAC preptests and other publications instead of dropping a cool G on a prepcourse- cause they're gonna just sit you down and teach you what you can learn on your own or with a group of people. But who knows, I might crack down and take a weekend course if I need it near the end.