Everything they said, and also: understand the questions. The LSAT repeats questions constantly, just in different guises, and if you truly understand the questions you will easily spot the repeaters. Don't worry about timing yourself for now. Instead take your time and really work through the problems in depth, far more than just picking the answer. Work through each wrong answer and identify why the answer is wrong and why the test thought you might pick it anyway. Grok the question. (sorry)
After that, you can start worrying about the clock again.