Hi Marcab,
Almost all of the content that you'll see on the GMAT now is the same content that you saw back in 2013. The biggest changes are more to the physical length/timing of the Test (both the Quant and Verbal sections are shorter - meaning fewer questions per section and less time to complete each section).
To start, we need to properly assess your current test-taking skills. Thus, it would be a good idea to take a FULL-LENGTH practice CAT Test; you can take 2 for free at
www.mba.com (you have to take those 2 CATs online though; they are no longer download-able). If you want to do a little studying first, so that you can refamiliarize yourself with the basic content and question types, then that's okay - but you shouldn't wait too long to take that initial CAT. That score will give us a good sense of your natural strengths and weaknesses and will help provide a basis for comparison as you continue to study. A FULL CAT currently takes about 3.5 hours to complete, so make sure that you've set aside enough time to take it in one sitting. Once you have those scores, you should report back here, we can discuss the results and how you might go about studying for this next attempt.
I'd like to know a bit more about your timeline and goals:
1) What is your goal score?
2) When are you planning to take the GMAT?
3) When are you planning to apply to Business School?
GMAT assassins aren't born, they're made,
Rich