Finally done! From 640 (Q48, V31) to 740 (Q51, V39) in 2.5 month

My journey towards acing the GMAT started at March, but until June I was not studying hard, because my trip through South America really distracted me from preparation.
First attempt
I took my first exam at the beginning of July and scored 640 (Q48, V31), a score which was not satisfying. From that moment I realized that I should study harder and set preparation a top priority. Previously, my difficult relationships with boyfriend, thinking about finding a new job and other issues were distracting. From the moment of my first try I started spending 5-7 hours a day for my preparation and chose private tutors for both Quant&Verbal.
Second attempt
The next time I scored 680 (Q50, V32), and that was an awful experience. After nearly 15 questions on Verbal I realized that I am going out of time, that fact led me to inability to concentrate and go forward. Finally, 10-15 answers to the questions I just picked randomly without even reading. I said to lady, who was controlling the room, that I want to stop the exam and cancel my score immediately. The lady turned out to be wise one and advised me to go in till the end and at lest get to know my result. Surprisingly, it was better than previous one.

After my second attempt started the final part of the journey
Some key points of it:
1. I decided that tutoring doesn't work for me and small improvements do not worth that money which I paid. Therefore, I started to concentrate on e-gmat, which I bought few months before, but was not stressing much attention on it. It was a huge mistake to underestimate it! The information in the course is much more structured than that from tutors. This feature is extremely important for rational person;
2. I watched webinars from gmatclub, and most of them were highly informative. The one which was really useful and eye-opening was the one with the full verbal test. Rajat, thank you really much for that opportunity! After the completion of it I saw an estimation of my abilities and some tips how to improve them. Cool! Because it is always difficult to define your path and understand weaknesses. You may ask why it was an eye-opener? It was the first time when I realized that my weakest skill is reading;
3. About reading. I watched a lot of different videos on reading strategies and read a lot of articles how it should be improved. As a result, I was really overwhelmed with all that information. But! The strategy that works well for me is the one which I saw the first. It is the one which I learned from gmatclub RC webinar. There are some principles in it, but the main difference from others strategies is that you should read all the text, not only first and last sentence of each paragraph or any other way. As long as you understand the whole paragraph, it takes only 30-50 seconds to answer each question. Moreover, the more you read, the greater is your skill. So, I read all the official passages, which I found in the internet and bought a subscription for the Economist. Each article I tried to asses from different points of view: 1. Read to understand; 2. Analyze each part of information and understand why it is given; 3. Read with what e-gmat calls "SC hat". I tried to read each sentence once again and understand it's structure;
4. Quant was pretty simple for me, because I have predisposition to it. But you should know, weather or not you have good mathematical skills, some problems may have non-standard approach and solving them you could be time-consuming if you o not know approach. A lot of practice in solving difficult questions worked well for me. Finally, after reading a task I knew what steps should I make to solve it successfully;
5. About sources. Of course, I started from reading all MGMAT books. In my point of view, it is the best material to start with. After that, I bought MGMAT tests, which I did not find useful, because content seem to be different from the original exam. In case of any questions or difficulties I looked for answers in gmatclub discussions. The most useful resources for practice was everything official (guides, tests), gmatclub (tests and CATs) and, of course, e-gmat. At the beginning, information in lessons sees obvious, but, firstly, you should not underestimate importance of understanding basic concepts and, secondly, material is becoming more complicated. There are a lot of practice in the e-gmat pack. Also, after allmost all video lessons you can find quizzes, which are intended to assess your improvement;
6. As I said previously, you should be highly concentrated and try to avoid distractors;
7. Stress management. It was one of the most difficult issues for me. The salvation was to think about the GMAT not as really important staff with time-constraints, but as one more CAT just as those which I did previously at home. Moreover, I tried to calm myself by saying that it is not the only part of my life, so even if I fail, I will not become a worse person. Finally, we never know what the Universe has in store for us.

I hope to be at least a little bit helpful for you, guys. Good luck!
P.S. Sorry for my imperfect writing skills.