I'm sailing in a similar boat : the one that tilts from 640-680
. However when I boarded the boat and started the journey the boat tilted from 550-580 ( or is it between a score of 550 and 580
).
Here's what I did and am still doing to improve - this might help you.
Analyze weaknesses : There's nothing that will help you more than analyzing your weak areas. No matter how many problems you solve, no matter how many tests you take, if you cannot isolate your weak areas - you will practically see no improvement in your score, yes I am talking about gradual improvement. By looking at your score you might be scoring an average of 70-75% in all the areas. However if you look closer you will find out which areas are your weak zones as compared to the peer areas. You might be scoring 80% in numbers and 60% in algebra. Something like that. Identify these and make a note. A very good starting point is the Free
manhattan GMAT test. It won't cost you a dime but will help you by providing a clear map of your weak areas.
Get to the core of the basics: I can't emphasize more on this. All GMAT questions test the basic principles of mathematics and grammar. Agreed, you have to memorize a few idioms but the basic grammar is the key. When to use 'less than' and when to use 'lower than' is not a concept from a masters literature exam. So if you can, get a book that covers the basics of mathematics and also a good grammar book. There are several recommendations on this site. If you search for the right thread. Understand the basics, understand them again and again. This is boring and time consuming but the improvement you'll gain is tremendous.
Specifically for verbal : Just pick up one of the few fiction books bb has listed and read through them during free time. They will vastly improve your language knowledge. You'll come across several idiomatic constructions, proper sentence constructions and a ton of RC like passages.
More than anything, browse through the questions in these forums. You'll be amazed at some of the solutions like that 'graphical approach to inequalities'
.
Good luck.
-pradeep