Discipline and determination. The GMAT is a sacrifice and you have to really want it.
A lot of it is not so much learning material but getting the rhythm of answering those questions under 2 mins. That takes a lot of practice, there aren't that many shortcuts for the GMAT.
Here are my 2 cents of advice:
1. Most quant problems have several different ways to solve them, pick one you are comfortable with and stick to this method. You will become a pro after going through many problems and attacking them using your chosen method.
2. Don't be afraid of problems that seem difficult. Make an effort to understand them, get a tutor, whatever it takes. Once you nail these you will smile when you get a similar problem in a practice test or even better, in the real thing.
3. Data sufficiency is your friend. These problems are quicker to solve, they just seam daunting because it's a completely foreign type of question. Some of the problems you can solve just by estimating and discarding the answers that are way off. When your running low of time, DS questions are often easier to guess. Memorize what all the letters mean, so you don't have to look at this during the test.
4. You should take some of your practice including all parts of the exam, not just verbal and quant. The reason for this, is that you want to measure what real exam conditions are like. By the time you get to the verbal section you are already tired and your reading comprehension abilities are not perfect. If you do just the verbal and quant, you are tricking your brain into believing the exam is a lot shorter than it it.
Finally, if you want to take a study break but still do something productive towards your MBA: try pymetrics. pymetrics is a neuroscience game-based career assessment test that reveals your cognitive and social traits. pymetrics is a great resource for internships and full time jobs after your MBA. It will give you a sense of the different career possibilities you have and companies you should be in the lookout for. It also puts you as a candidate in the radar of these companies.
it's free, fun and incredibly accurate.
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