First, a huge thank you to this community and all the great posts. I learned so much here, in ways I can't even begin to list.
I started with a first practice exam from Veritas Prep on August 9 (640, 39, 39).
I took (and paid for) every practice exam I could find that seemed decent. Against the advice to save the official GMAT's till the end, I took the first two early in the process, since they are real questions. I felt taking them early would best serve my learning. I also found the additional gmat prep exam packs well worth it. I took practice exam 5 on October 3 and scored 770 on that.
Anytime I felt a company's questions were not representative or typical, I moved quickly to other vendors. I found the following most useful: official gmat tests, veritas prep,
manhattan prep, gmat club (for analytical only, I think the verbal items are awful).
A week before the exam, I decided to change my strategy wrt the Analytical Writing section: instead of using a template, I reviewed every topic and answer provided here:
https://www.english-for-students.com/Ana ... ument.html. After reading over about 20 of them, I started to think through each topic before seeing the provided response. I felt there was such a varied set of topics that called for different types of responses and was worried I wouldn't score a 6 if I used a template.
Overall, I spent 90% of my time practicing full-length exams and only 10% studying outside of the practice tests. I must have taken 75 full tests. I reviewed every wrong answer or answer I wasn't sure about, and often redid the question.
Also, I scheduled and paid for two exams (second one coming up in 10 days)... I wanted to feel completely comfortable canceling my first exam if it didn't go well. Thinking of it as a practice exam took some pressure off. If you can afford it, I highly recommend it.
I started with analytical. On the first question, I panicked and my mind froze. I finally had to test 3 of the possible answers, using over 4 minutes. But I regained my composure. Deep breath.
I hope this is helpful.