I hope you are well. Great job getting through the OG and the verbal review. A few questions:
1. Are you equally strong in RC, CR, and SC or do you have specific strengths/weaknesses?
2. Have you worked on the 9 GMAT Paper Tests, Question Pack 1, or the 10 FLTs?If you want a lot more practice on verbal then I would approach LSAT logical reasoning and GRE reading comprehension.
There is an almost unlimited amount of practice from those two resources. Also, LSAT/GRE verbal is generally tougher than the GMAT so these questions are great practice BUT you will probably be very challenged by them. Stay methodical and organized. On the LSAT skip parallel reasoning questions (parallel flaw as well). You may also find questions that involve heavier formal logic than the GMAT so you may skip those as well or just don't worry if you feel challenged by them.
For sentence correction you do not have many choices. The SAT has a section similar to SC BUT the questions are easier.
You can also pick up the elements of style which has a great briefing on the major grammar rules.
If you have time and really want to sharpen your verbal then work on the LSAT/GRE for a few weeks while reviewing your OG and Verbal review error log
and then come back to the 9 GMAT paper tests which will give you a good indicator of where your verbal score is. After you have exhausted the GMATPrep tests
you can work through the GMATPrep docs.I would also suggest reading a challenging article from a dense magazine or newspaper (Economist, Wall Street Journal...) every day.
Read for total comprehension and look up words that you do not know. While reading be thinking about what the facts are, what the conclusions are, what the assumptions the author is making, and what the main idea of the article is. This reading will help your performance on the entire test.
Please let me know if you need more advice on this.
"It is a curious property of research activity that after the problem has been solved the solution seems obvious. This is true not only for those who have not previously been acquainted with the problem, but also for those who have worked over it for years." -Dr. Edwin Land
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IMPROVE YOUR READING COMPREHENSION with the ECONOMIST READING COMPREHENSION CHALLENGE:
Here is the first set and some strategies for approaching this work: http://gmatclub.com/forum/the-economist-reading-comprehension-challenge-151479.html