Holzbesen
I want to start preparing as soon as possible, but first a couple of questions.
1. Does anyone know when the Official Guide 2021 will be released?
2. Does buying the e-book version got any disadvantages?
Example: mba. com/exam-prep/gmat-official-guide-2021-ebook-online-question-bank
"Additional 150+ online questions (not included in ebook)"
3. If waiting isn't worth the time and I should buy the 2020 one - is there any coupon I can use?
It is reasonable to either:
1) Buy the paperback 2020 bundle (3 books) here, for $53.92:
https://amzn.to/2XX88aj2) Buy the 2021 ebook next week (mba.com says "approximately April 28th"). I believe they will be similar in usefulness, and most questions overlap. (the 2020 version advertises "over 1,700" problems, whereas the 2021 version advertises 1,895 problems)
I recommend registering your books for use at the Online Question Bank at Efficientlearning.com. The site will track your stats, time, and give you the official explanations for each problem. You can use "Study" mode to take multiple tries at each problem before revealing the correct answer, or "Exam" mode to do timed sets and simulate a practice test. It's much more efficient than either the ebook or the paperback. If the official explanation is confusing, I recommend searching GMAT Club for a better explanation from the community (you can paste the start of the question into google or the gmatclub.com search tool).
One more tip: a useful mantra is "Review, Reflect, Re-do". Particularly on verbal, it is critical to understand WHY the choices are wrong or correct. In "Study" mode at Efficientlearning.com, if your answer is incorrect, give it a 2nd try -- think about what you might have missed, and then select another answer. For any questions that are wrong/slow/guesses, Review the solution and Reflect on how you could improve and prevent a similar mistake next time. There is a "Notes" feature you can use within the question bank, or use a separate
error log. Later, come back to these problems and Re-do them. Extensive Re-dos are highly under-utilized among most test-takers. I also recommend creating your own flashcards, with paper index cards, immediately after you notice something that you are weaker or slow on. Active quizzing later is much better than just taking notes. Then make a separate pile for those that are 100% instant and automatic, vs. ones that could use more work.
Best wishes with your training and exam!