well, i'm not one of the >170 group, but I'll tell you what I did anyway.
I started about three weeks before the test, got the PR Cracking the LSAT book, and several of the most recent old LSAT's. I took one practice LSAT, not timed. Saw where I was having the most trouble, went over that section of the PR book (the tips and strategies), then took another practice LSAT, not timed. Saw a drastic improvement on the section I'd been having trouble with. When onto the next most troublesome section, reviewing the tips and strategies in the PR book. took another practice test, didn't improve, so went over that section of the PR book again, another practice test, improvement. then took a timed practice test, and another.
my plan had been to go through each section, then take a practice. but the week before, i had a death in the family and spent the week at a funeral.
the night before the test, I went gambling and drinking to avoid thinking about it all. I'd recommend that to anyone. I still fell asleep by 1, and felt great the next morning. nice cup of starbucks before the test, too.