Hi rpm,
Here is some advice you can follow regarding your study plan.
Adopt a prep strategy consisting of topical learning and practice. In other words, focus on just ONE topic at a time and practice that topic until you achieve mastery.
For instance, let's consider your study of Number Properties. First, immerse yourself in all aspects (formulas, properties, techniques and strategies) of this topic, and then, focus solely on Number Property questions. After each problem set, take the time to delve into your incorrect answers. This self-reflection is a powerful tool that allows you to understand your learning process and make significant improvements. For instance, if you made a mistake in a remainder question, ask yourself why. Was it a careless error? Did you not apply the remainder formula correctly? Was there a concept in the question that you didn't grasp?
By meticulously analyzing your mistakes, you will efficiently address your weaknesses and, consequently, enhance your GMAT quant skills. This process has been unequivocally proven to be effective. Number Properties is just one example; be sure to follow this process for all Quant, Verbal, and DI topics.
This article outlines the different phases of your prep:
The Phases of Preparing for the GMAT Once you have mastered all of the content, you can begin taking official practice tests. With each test, carefully review your results to identify remaining gaps in your content knowledge and work on strengthening those areas until you fully understand them. Then (and only then) take another practice test. Repeat this process until you reach (or exceed!) your goal score.
Here’s an article on how to structure your prep:
GMAT Preparation Strategy