The definition of insanity is doing the same thing over and over again -- and expecting a different result each time.
Every person learns differently, so find the resource that works for you. We happen to take a visual, thought process approach. You can see our free sample videos at the bottom of our homepage.
Focus less on the score - and more on actually learning from mistakes. GMAT can only ask you the same types of question in so many ways. Master these ways and you will know all the booby traps before they even come to you.