i scored a 166(95th %ile) without taking a prep course, and on practice tests i was averaging higher. prepcourses are a complete waste of money unless you can't keep yourself focused and need the structure to stay on schedule. like thepope said, i knew people that spent $1000+ on courses and went up only a few points, while i studied on my own and went up by 15. buy an lsat book, i used 'mastering the lsat,' and all the preptests you can from lsac. go through the book, supplementing with preptests, then do a preptest every other day or so, going over every answer the next day and figuring out why each is right or wrong. good luck.