Exhausted all OG questions

Hello, StillON. Unless you have been studying for years and taking the test intermittently, I would say you made a rookie mistake: blow through the OG and supplemental guides assuming that you will get better the more you expose yourself to. The GMAT™ does not work that way. And before you blow through 6-8 weeks' worth of other material, I would urge you to spend more time with questions you have missed or found challenging from the OG. Particularly in Verbal, it is important to understand what makes the wrong answers incorrect as opposed to feeling as though you understand why the right answer is correct. Sure, you may find the questions easy, knowing what the answers are ahead of time, but can you disprove the others? If not, then I would say you will continue to make the same mistakes on new questions, without any real progression. (I hope you are keeping an error log at least. That would make review much simpler.)

I agree with Anki2609 that older official GMAT™ questions are an excellent source of supplemental questions. You can find them by sorting through various filters in the Practice Question Banks—e.g., "Reading Comprehension" + "Official Guide." I am not a big fan of switching over to LSAT material unless you have a tutor or teacher to screen the passages and questions beforehand, since there are enough differences between the two tests that you may lose sight of what it is you are studying for, what a GMAT™ passage and question set looks like compared to those of its counterpart. If you feel you must see new questions and have managed to exhaust the more than 4000 official Verbal questions (about 1400 of which are RC questions), then you could check out high-quality third-party material, such as that by Manhattan Prep or Veritas Prep. Nothing beats official material, but if you must...

Finally, if you have not already, you may want to check out some of the free RC strategy videos on YouTube—GMATNinja has published quite a few such tutorials, and many students have found them helpful. I would suggest something different, in any case, from what you have been doing. If there were a linear relationship between the number of questions attempted and the eventual exam score earned, then most people would probably put more time in and earn higher scores. You want to work smarter, not harder.

Good luck with your studies.

- Andrew