I'm assuming that your target score is much higher than 590.
I typically suggest that students achieve their target score on at least 2 practices tests (preferably, the official GMATPrep practice tests) before they take the official test. If this isn't the case for you, then I suggest that you reschedule your test (students seldom experience a dramatic increase in abilities when they walk into the Test Center).
If rescheduling isn't an option for you, then I suggest that you spend the next 10 days focusing on concepts that have the greatest return on investment (ROI). These are concepts that are tested frequently and require the least amount of time to learn. In my opinion, these concepts are:
- Sentence Correction
- Data Sufficiency strategies (we have a free set of DS videos:
https://www.gmatprepnow.com/module/gmat-data-sufficiency )
- Percent
- Integer Properties
- Powers/roots
- Algebra
- Geometry
I say all of this because I see a lot of students spending a considerable time agonizing over concepts like Probability and Counting, when these concepts are seldom tested.
CR and RC questions probably have the lowest ROI. I'm not saying that you shouldn't prepare for them; I'm just saying that improvements take a long time, especially for non-native English speakers. For CR, be sure you understand the various question types.
Finally, try to take several practice tests in order to perfect your time management skills and build your endurance.
I hope that helps.
Cheers,
Brent
