Dear all,
I need advices for my GMAT preparation.
I plan to take the test in 3 months (by the end of May) and my target score is 750 (or around).
I bought the 10 books of
Manhattan prep and the 3 books of the OG 2017
I've been studying the quant part for almost a month now using the OG but i felt like i'm not getting any better and i'm not sure i'm studying the right way

.
I do keep track of my errors and try to identify my weeknesses then i work on the corresponding topic using the
manhattan prep books but i feel like i'm not doing it correctly .
Lastly, i bought the
magoosh gmat prep, i took the diagnostic test and i got really bad results

.
Now, i want to start all over again but i need advices on how to study efficiently with all these materials (
Magoosh,
Manhattan prep books, 3 OG books). Should I study the Quant part and the Verbal part at the same time or should I work on one of them at a time? My materials give me access to full-lenght tests, when should i start taking them?
I plan to take two weeks off in may before taking the test but until then i can work 2hrs/day during the week and i am trying to manage my time to work more hours on the weekend.
Thanks in advance for your advices!