Sure thing! I was struggling the same way you were. Here are my thoughts:
I'll separate out quant and verbal because they took very different amounts of work for me. I was able to make a big verbal jump quickly and focused on two things (below). Remember: don't skimp on the verbal! You can make huge leaps and put a high ceiling on your GMAT score by getting consistently good verbal marks. My scores progressed 700 (44Q 41V) to 720 (48V 41V) to 750 (49V 42V). Thus, I was able to hit the 700 mark every time even though I sucked it up on quant a couple times.
1) For RC/CR: focus on UNDERSTANDING. That's it... Best strategy: read a sentence/section then paraphrase what it ACTUALLY MEANS. Read the next sentence/section, then go back and paraphrase what BOTH sentences/sections ACTUALLY MEAN. Do this until you finish the RC/CR. It is slow at first, but if you practice, you can get fast at it. I finished my verbal section with 4 minutes to do my last question. After using this strategy for many, many practice questions, I found that, in many cases, I actually new what the question was going to be before I even read it. Also, in the end, this saved me time because I never had to write anything down. I knew the passages/questions so thoroughly by the time I finished reading that I could answer the questions quickly and, for the most part, from recall. For me, this strategy literally took me from 33V to 40V. To get from 40V to 42/43/44+V you have to do a lot of practice with it and get very comfortable with difficult RC questions. (Two other side notes: only use official GMAT questions for verbal and when you get a question wrong, take as much time as you need to UNDERSTAND WHY.) To get faster at this strategy, read articles from reputable magazines (Economist, New Yorker, Nat Geo, etc.) I read 2-3 every morning while I was getting better at this just to wake my mind up master the strategy.
2) For SC: again, one, simple strategy: when you go through the practice questions, you should be able to explain to someone exactly why each wrong answer is not correct. My biggest mistake was choosing right answers but not knowing why wrong answers were wrong. This will kill you with hard SC questions. This is painfully slow at first, as often I had to spend 5-6 minutes per question looking up exact reasons for why answers choices were wrong. However, it is worth it. (Pro-tip: be careful who you trust. Prep books don't give great responses and some people will post wrong reasoning.
GMATNinja is THE BEST resource for verbal questions. His question-of-the-day series gives ridiculously good answers for why wrong answers are wrong and you can watch all of his videos on youtube--I watched ~10 hours worth of him breaking down questions. If you can find his answer explanations for questions, read them! Also, use people's profiles to help guide who you trust; if someone got a verified, 44V+, for instance, he/she probably knows what the heck they are talking about.)
For quant, I went through several ceilings and it was tough to break through every time, so don't give up! I struggled with three things (in this order):
1) I couldn't get practice questions right consistently: this was because I didn't know the basics. Everyone starts here. To get past this stage, I think the
Manhattan prep series are amazing. You might defer to the opinion of actual tutors/experts, but I think you are past this stage if you are scoring legit 46Q 36V practice GMATs. (The
Manhattan prep advance quant book is a good way to start getting into the deep waters with quant.)
2) I couldn't get the questions right under time pressure/on the practice exams: ever look back at your practice exam
error log and realize that you should have gotten every question right? Yeah... I have been there. For me, I used a tutor to help me get through this stage.
abhimahna is THE MAN (thanks for all your help!). I don't know if he is still tutoring, but if not, I'm sure there are many other good tutors you can find. It's a commitment, but it was well worth it for me. If you don't want to use a tutor, the gist of what I worked on was THOUSANDS of practice questions, making sure I UNDERSTOOD each one. Doing 40-50/day from specific sections (e.g. 300 for rate/time, 300 for word problems, etc.) By the time you have done enough, you can start to read a question and know, for the most part, what is coming. The GMAT uses templates for their questions, understanding the templates by heart will ease nerves on test day (see below) and help you with strategy. You don't need to get every question right to get a 49Q--far from it. You need to know your strengths and weaknesses, so you know which problems to spend extra time on and which to pass.
3) I could not perform to the best of my abilities on test day: this was THE MOST FRUSTRATING of all the steps. My last two CATs were 50Q 47V... my first THREE official GMATs were 44Q 41/42V (700). Conquering this last step, performing on test day, was all about controlling my emotions and mindset. For my 700 scores, the test felt like it was coming at me a million miles an hour--it was like I hadn't studied at all. I don't think my understanding of the material changed over the course of taking official exams either. The biggest step was calming my nervous. Unfortunately, this is easier said than done. For me, it came after getting my 720. The next time I took the exam, I didn't feel any pressure at all. I went through the questions calmly, absorbed the info, skipped questions before spending way to much time, etc. My 750 was actually the most enjoyable of the exams that I took. Again, hard to practice for this... but I would say, JUST DON'T WORRY. If you put in the work, you will do well. Getting overly nervous will only hurt your scores. Plus, as mentioned, you don't need to be anywhere near 'perfect' to get even a 760. We had a sports psychologist talk to our team in college and he said something that is very relevant to GMAT test-takers. To paraphrase, 95% of an athletic event is the training/physical aspect--only 5% is mental. BUT, that 5% mental aspect can DESTROY all of your 95% mental preparation. It is the same with the GMAT. 95% is practice only 5% is managing test-day stuff, but, speaking from personal experience, that 5% can have a huge impact on your overall score.
*One tip: read the initial instruction pages at the official exam just like you are reading a question (see above). This is stupid but helped calm my nerves. I started with verbal and realized that I wasn't actually absorbing info the first 1-5 questions because I was too hyped up. I started reading those intro pages to make sure that I was actually absorbing basic info...if you can't even read the test-day rules, you probably aren't going to comprehend a difficult CR question! This seemed to help me slow my heart rate and get into the right mindset.
I hope this helps! Just don't give up. Again, my scores 700, 700, 700, 720, 750, so I understand GMAT disappointment