I'm planning to take the LSAT either this October or next February. I'm starting to prep now. I'm taking a free practice LSAT administered by the Princeton Review at my school in a week. I've been reading glowing reviews of the Powerscore bibles, so I think I'm going to buy the trilogy and the book of 10 actual LSAT's put out by the LSAC. Should I be concerned that the LSAT's in the book are old, from the early 1990's in some cases? Or has the test remained relatively the same throughout the years? I decided against taking a prep course, partly because of the money, but mainly because I am a disciplined enough student to study on my own. Any constructive criticism on my plan?