I was a little surprised when I saw the score pop up on the screen. The Pearson guy handed me my score and said that it was the highest score he'd seen. Needless to say, I was pretty pumped:!:
I didn't have a lot of time to study. I took 10 days off from work during the holidays and just did practice questions relentlessly every day. I bought the OG and did the diagnostic first. The diagnostic told me that I was weak in Data Suffciency. This was true - DS definitely gave me the hardest time out of all the problem types.
A week before the real test, I took GMATPrep Practice Test #1 and got a 720. Missed too many of the data sufficiency questions, and also nearly an entire RC passage (ouch!). At this point, I decided to do every single DS problem I could find, and after doing ~50 of them, I started to get a "feel" for the problems, i.e., I felt that I didn't need to do out all the steps to figure out what the correct answer was.
Took another practice three days before the test - got a 770 this time and cut down my DS mistakes from 9 errors to only 2 errors. I was feeling pretty good at this point.
Test day came - I just went in to the center, got in early, and the proctor showed me to a small, 1-person private room that was separate from all the other test-takers. This was nice because I could close the door and just focus on nothing else but the screen in front of me. The AWA got me warmed up. I didn't feel like I really nailed either essay but I followed the structure I'd laid out for myself (ended up with a 5.5 AWA). Then came the math section. The first few questions were pretty easy, but I started to struggle by about question 15 of the math section. Then came a rough stretch until about question 25, when the test got easier. I was slightly behind on time at the 20-question mark, but finished the section about 10 mins ahead of time.
Verbal was a different story. I have a strong quant background (engineer, tutored calculus in college) but I've been an avid reader my whole life, and I read everything. I am also a quick reader. Reading comprehension was good for me, because I've definitely read some pretty cryptic documents in my lifetime. Sentence correction gave me some trouble, but I think my years of practice with reading all sorts of things helped me a lot here. Critical reasoning was the hardest, but I knew that if I could just curb my natural impatience and force myself to read the questions twice, then I would do OK. I finished the section in about 40 minutes (~1 min per question) - I was just anxious to get my score!
I expected something in the 720-770 range - I was definitely surprised to see the 790 come up! I think the single most important piece of advice is: you need to be confident in your own ability to absolutely nail this test. The GMAT is a very tough puzzle that CAN be cracked. When you're studying, you have to be proactive in recognizing your weaknesses and work VERY hard and in a focused manner to eliminate or at least ameliorate those weaknesses. That was me with Data Sufficiency. I worked my butt off and recognized/corrected the flaws in my thinking before I took the test. You have to be willing to do the same. I certainly didn't want to take it twice, and I can't imagine anyone else wanting to either.
A quick thank-you to all the regular posters on this board. While it was intimidating to see all the 750+ scores, it gave me some hope that I could do the same as well. If anyone would like to know more, please contact me and I will try to help. I'm certainly no expert like some of the other folks on this board, but I can try.