Hi ronit1984.
First off, one way to increase your quant score is to just keep finding less strong areas and working on each in turn. For any type of question that you kind of don't like to see show up, work on that type until you would be EXCITED to see a question of that type show up.
By taking that approach with maybe a dozen types of quant questions over the next few months, you could significantly change what you have going on in quant.
There is, though, another aspect of scoring high that you have to consider. You have to get right answers consistently, in both quant and verbal. Many people don't realize that learning how to get answers is not quite the same as learning how to get right answers. In other words, it's one thing to understand how to answer a question and another to actually end up getting the right answer.
So you have to work on getting right answers. If you were to spend five minutes per question, would you get 90% right? What about 20 minutes per question? At this point in your training, take as much time as you need in order to get at least around 85% right. Get used to getting the right answers consistently, and once you can get right answers consistently, only then seek to speed up.
That leads to another point.
Recently someone who was scoring around 30 on the verbal section asked me what to do in order to score higher. He had been prepping for a while and already knew all about GMAT verbal. So I told him that he didn't really need to learn anything else ABOUT GMAT verbal itself to score higher. He just had to change his way of handling the questions, doing things like paying more attention to what he was reading.
Guess what, within six days, he scored 42 on the verbal section of the test, a jump of 14 points from the last score he got before our conversation.
Why he could do that is that scoring high on GMAT verbal mostly takes noticing details and using logic. So your path to a higher verbal score is similar to your path to a higher quant score, in that in verbal also you need to focus on figuring out what you need to see and do in order to get RIGHT answers. Whether you are looking at a Sentence Correction question or a main idea Reading Comprehension question, basically the same skills apply. You have to see what's going on and to use tight processes that lead to you to the right answers.
So keep learning concepts as necessary, learn to apply them, and, most of all, look at HOW YOU HANDLE QUESTIONS in general to figure out how you can see things more clearly and get right answers the first time.