Question: you say that you gave full-length "prep papers" - do you mean that you took the old version of the test, when it was still given on paper? The test switched to a computer version (CAT) in 1997 (that is, a very long time ago) and taking the CAT is VERY different from taking a paper test.
So, first, if you have been taking paper practice tests, don't do that any longer - you need to take CAT (computer-based) practice tests.
You mentioned that your two practice scores were 600 and 610, but your goal is a 650 - so, unfortunately, you shouldn't have expected to hit the 650 mark on the real test. Know that for next time - what you're getting on practice CATs taken under 100% official conditions best approximates what you can expect (hope!) to score on the real test.
On your two practice tests, there was quite a difference in your Q and V scores - why do you think they fluctuated so much? That's important to figure out so that we can try to stop the fluctuation.
On the real test, Q was near the higher end of your practice range, but V dropped. Again, do you have any ideas about why both of those things might have happened? In particular, if you were taking a paper practice test, those tests are much less tiring that the real CAT, so you may have been more mentally fatigued than normal by the time you hit V on the real test. Alternatively, if you did anything on the practice tests that would have given you an artificial advantage (skipping the essay, skipping the IR section, taking longer breaks than allowed, etc), then that might also have meant that you were more mentally fatigued than normal by the time you got to V on the real test.
Okay, now I'm getting to the part of your post where you mention rushing on V and feeling you weren't comprehending clearly - so, yes, timing issues and mental fatigue issues can both contribute to a score drop.
Next, you mention that CR was taking too long, so you decided to drop note-taking on ALL CR Qs for the exam. As a general rule, don't completely change or drop an entire strategy right before the real exam. If you want to change something significantly, test that out on a practice exam first to see whether it's a good idea. Alternatively, you may need to work on how you're taking notes and learn to do so more efficiently. Another possibility: perhaps you're only slower on certain CR questions but not all, so perhaps there are some on which you should be guessing more quickly, while you can continue to take normal time on others.
do again analysis understand why the wrong choices wrong [one issue is I know most of the answers now]
That's only the beginning of your analysis. Have you analyzed why the wrong choices are
tempting to pick? Why would someone pick each wrong answer - what (faulty) reasoning would they use? For the right answers, why do they look / seem wrong or not so good? Why would someone eliminate the right answers? The traps on verbal are all about thinking that a wrong answer is better than the right answer - how do they get us to fall for that trap?
It's fine to get additional practice problems - though try to stick to OG sources as much as possible. The Verbal Review book is fine; you can also buy additional practice problems within the GMATPrep 2.0 software. Whatever you prefer.
For SC, you mention struggling with structure and timing. Look here:
http://www.manhattangmat.com/blog/index ... orrection/Okay, I just got to the part where you said you used the 6 "papers" from MGMAT - so you are actually taking CATs, you're just calling them papers. That's fine.
You can still take both GMATPrep and MGMAT CATs with repeats as long as you follow a few guidelines to minimize the chance of artificially inflating your score via question repeats. First, anytime you see a problem that you remember (and this means: I know the answer or I'm pretty sure I remember the answer, not just "hmm, this looks vaguely familiar..."), immediately look at the timer and make yourself sit there for the full length of time for that question type. This way, you don't artificially give yourself more time than you should have. Second, think about whether you got this problem right the last time. If you did, get it right again this time. If you didn't, get it wrong again. If you *completely honestly* think that you would get it right this time around if it were a new question (even though you got it wrong last time) because you've studied that area and improved, then get it right this time.
Also, go back to the resources I linked in my first post, particularly the ones about HOW to learn and time management. Let me know how it goes!