For quant, what I'm doing is going back to all the OG problems after #70 or so
Do you know, definitively, that this is why you didn't hit your goal - because you missed higher level questions? That's only one possible reason. Sometimes, the reason has more to do with making careless mistakes on lower level things that we already know how to do (or think we know!). And, even then, there could be multiple reasons why:someone might mismanage their time, leading to careless mistakes, or someone might have "holes" in their foundation, leading to mistakes on things that they only think they know how to do.
For most people, it's a combination of a lot of things, depending upon the particular question type and topic area. And, for most people, what holds you back is missing certain kinds of lower level questions or making careless mistakes on lower level questions - people are far more worried about the high level stuff than they should be. :)
So, my first recommendation: do they necessary analysis to figure out exactly what is holding you back. You'll probably find that, in many areas, it really is the harder questions - but that there are some areas where you're a bit weaker or where you tend to make careless mistakes. The difference between a 680 and a 700 could actually have more to do with missing a few lower-level questions than anything else - little things that pull you down 20 points.
46Q: 75th percentile
38V: 83rd percentile
Do the analysis described in the following article. Use a recent MGMAT test that you took under official testing conditions or as close as possible to official testing conditions (including essays). If it has been more than a month since you've taken a test or if your recent tests were under very non-official conditions (skipping the essays, not sticking to the regulation breaks, using the pause button, etc), then take another test under full official conditions.
http://www.beatthegmat.com/a/2009/09/23 ... tice-testsIf you want help figuring out what to do with your analysis, then post your analysis here and we'll help you interpret. (Try to interpret as much as you can, though, and then you can ask us if we agree with your interpretation - but try to learn how to diagnose your strengths and weaknesses yourself.)
I'm glad that you're using OGC (OG Companion) to dig deeper on the problems. Here's another article that describes the kind of analysis you should be doing on practice problems. This analysis should be done on ALL problems, even the ones you get right. Generally speaking, spend between 2 and 5 times as long analyzing problems (even the ones you get right) as you spent doing the problems in the first place.
http://www.beatthegmat.com/a/2009/10/09 ... ce-problemIf you come back to share your analysis of a recent practice test, I can give you more specific advice about particular question types, content areas, timing strategies, etc - it just depends what your particular strengths and weaknesses are!
For verbal, and here's the real problem, I just don't know where to go to get more practice.
Before I recommend anything specific, I really need to see your test analysis. I just want to mention that you don't necessarily need NEW material (or not right now, anyway). You don't learn much by trying a bunch of new problems - when you're trying new problems, you're doing, using everything you learned before you started trying the problem. Your review and analysis afterwards is where most of the learning occurs (and most comes from the deep analysis, not the initial review where you check the solution and see what you did wrong and how to do it correctly). You may not have extracted everything from the problems you already did - you may need to go back and actually analyze those, not just do and review. Read that "how to analyze" article above to learn more about this.