Hi there,
No offense intended, but of COURSE you aren't breaking the low 600's by completely ignoring half the exam! Verbal and Quant go together to make your scaled score. You can't have one without the other.

It's a common mistake to "only" do Quant, and then "only" do Verbal. The most successful students I have tutored have maintained consistent study in both, side by side, always actively reviewing concepts, diagnosing weaknesses, and then actively tackling them. It sounds like you just need a serious study plan overhaul! When is your June test date?
My biggest question is HOW are you studying? What books are you using/have used, and HOW are you using them? Yes, you will want to go through as much reputable material in books like the OG and MGMAT, and perhaps Powerscore, etc as you have time for, but the VAST majority of your study time should be spent "reviewing" or logging and examining WHY you get questions wrong, WHAT concepts those questions are testing, and HOW your strategy should be adjusted to get similar questions correct in the future. Especially for Verbal, students simply do better when they can recognize "what" a questions is testing quickly, and can anticipate what a "correct GMAT answer" should looks like. Remember: the GMAT is not an intelligence test. It simply tests one thing: how familiar are you with the GMAT?
My study plan advice is: compile a list of ALL the tested concepts, systematically review them, do 1 practice CAT each week, fully break each CAT down into an Error Log by concept tested, look for common themes in terms of WHY and HOW you get questions correct, then choose a MAXIMUM of SIX concepts each week to target for THOROUGH review. At the end of the week, take another CAT. Review, analyze, log, and choose/rotate six new concepts.
In addition, you need a MEMORIZED, INGRAINED strategy for EVERY question type (DS, PS, SC, CR, and RC) that you do for EVERY question, utilizing your scratch pad for maximum efficiency. This is what I work on with 90% of my tutoring students. So my questions to you are:
-what 3 Verbal Q-types do you get wrong the most often? Why?
-what is your relationship to your scratch pad?
-what 3 Quant concepts do you get wrong the most often? Why?
-what types of questions throw you off your pacing?
-how do you keep track of pacing within each section?
-what is your strategy for each Quant and Verbal question type?
-how do you adjust your strategy for each Verbal CR type (for example, how do you approach a Bolded statement Q as opposed to a Weaken Q)?
-how does your approach to DS and PS questions differ?
-what is the difference between a Value and a Y/N Data Suff in terms of what a correct statement will do?
I hope you find some of this helpful! If you'd like to discuss GMAT strategy further, you can reach me at
[email protected]. I offer daily sessions via Skype at the rate of $50/hr. You can also find free advice on my blog:
www.gmatrockstar.com.
Good luck to you!
Best,
Vivian