Umm, when I take an untimed test, I get a 178-180, and I venture to guess anyone with hopes of doing "well" would also score in that range. Correct me if I'm wrong, but it's the timed element that makes the test hard.
One thing I did, using the powerscore method, was to create flash cards with about 300 question stems and drill them repeatedly. I have not mistakenly categorized a question in weeks.
Good suggestion about the flash cards. The test I took was June 1994 and I think some of the question stems for LR are different. I take untimed tests to get myself familiar with the questions and to spot patterns within the test. The untimed practice helps me process the question types and strategies. I figured I need to be sure I knew what I was answering before I worried about timing myself. I do feel I have a firm grasp on the question types and such, now I am moving into timing myself.