Also – if you plan to go for a job with MBB – McKinsey, Bain or Boston Consulting Group, they only consider candidates with a GMAT of at least 720 if you are attending a top 20 school or 700 for a top 10 school.
Many applicants forget – GMAT prep is not like a normal class. The questions you solve will not be on the test. It’s not about learning the material and regurgitating it on test day. Doing a ton of problems won’t guarantee you a good score.
Rather, you want to develop a strategy – a replicable model – for each question type that will lead you down the path to solving the questions correctly. Also, you want to train your brain to perceive the questions in a different way. You need to learn new strategies, but also, you need to become aware of how you are perceiving and approaching the questions now.
What are your blocks and blind spots? This generally requires 1-1 interaction with an outside observer to observe and determine these things. If you are thinking about retaking the GMAT, get started early. You don’t want to be studying for the GMAT while preparing your applications. I recommend private tutoring over any commercial classes, because each student has a completely different set of strengths and weaknesses.