The best technique for me was making sure to go through the arguments one at a time. Specifically, do one question, refer to the answer key to see whether you got it right or wrong, and if you got it wrong, figure out why you did. If you figure it out (which, for most questions, is very possible after a couple of reflective minutes), right down what you did wrong. This is the best way to truly improve on the LR section because you can see not only why the answer is correct but what you were thinking when you got it wrong. However, If you can't figure out why you got a question wrong, circle it and ask someone for help (such as a tutor or friend). Doing the method this way may take an hour to an hour and a half per LR section, but your speed will naturally increase from this excercise nonetheless. It helped my Args increase from about 16 right / section to 22.5 right / secion.