Haha, idiotic? Perhaps I wasn't clear enough, but I meant to redo problems with the time left over during a test. For instance, in a math section, I have 25 minutes, and I finish it in 20. With the 5 minutes leftover, I would redo problems, especially the ones tha require a bit more thinking. I don't know about you southbay95, but I prefer looking "idiotic" in a test room by redoing problems than regretting a drop in my score because of "idiotic" mistakes.
For CR, I recommend that you read more books and participate in interpretation sessions in English class. I'm pretty sure that is what pushed me up. Some extra practice helps as well. PR
is pretty good for CR, so if you have the spare time, just do CR sections in tests.