On scored a 150 on the Kaplan CD-ROM diagnostic test. I scored a 151 on the Barron's CD-ROM diagnostic. I scored a 151 on the PR CD-ROM diagnostic test.
I ditched all those crappy books and concentrated on "10 Real LSATs", "10 More Real LSATs", and "The Next 10 Real LSATs". My first test yeilded a 158, next was a 163, then a 157, and a 158. I still have 27 tests to take, and the LRB and LGB is on the way, which (hopefully) will cut my LG mistakes in half, my LR mistakes in half, and bump my score to mid-high 160's.
Use the real tests and LGB and LRB. I hear this is the best way to go (sans a Powerscore or Testmasters course).