Reddit reviews 30 Day GMAT Success: How I Scored 780 on GMAT in 30 Days... and How You Can Too!
We found 1 Reddit comments about 30 Day GMAT Success: How I Scored 780 on GMAT in 30 Days... and How You Can Too!. Here are the top ones, ranked by their Reddit score.
I recommend this book as a guide http://www.amazon.com/30-Day-GMAT-Success-Days/dp/0615326277 you can probably get the ebook somewhere I believe they sell it on their own site or something.
You'll also need the official study books as well probably. And as others have said try to get as fast as possible because even if you're doing well you will run out of time as the computer gives you harder and harder problems in the math section.
I used that and studied about 5-6 weeks and got a 740 on my first try.