Hey Zob,
So you're super-close, although I'm not sure you can 100% pull out an extra 20 points in less than one week. What is the exact date of your re-take? Could you postpone it by an extra week so you have time to formulate a solid 10-14 day study plan?
I think the problem is that Barron's and PR aren't sufficient for high-scorers. I'd recommend you also get the MGMAT SC book. The reason it's so valuable is because it divides its chapters by SC concept, and then lists in the back all the OG 15 questions that test that specific concept, so you can read about the concept, then immediately put it into action with back-to-back official questions testing that same specific concept.
If you try to do the OG15 straight through, cover-to-cover, then you'll just be doing a jumble of concepts and so there's less likelihood of mastery.
I'd recommend you plan to do the GMATPrep CATs at regular intervals, then do an Error Log for each one (see attached template). So, for example, a 14-day schedule might look something like:
Day 1 - GMAT Prep 1 (baseline) + Error Log
Day 2 -
Day 3 -
Day 4 - GMAT Prep 2 + Error Log
Day 5 -
Day 6 -
Day 7 -
Day 8 - GMAT Prep 3 + Error Log
Day 9 -
Day 10 -
Day 11 -
Day 12 - GMAT Prep 4 + Error Log
Day 13 -
Day 14 - ACTUAL GMAT
You may want to do a couple sessions with a tutor to make sure your CR and RC strategy is in good shape. After each Error Log, I'd pick 3 concepts from this attached GMAT concepts list to hone in on in the days in between CATs. The idea being that rather than doing the "throw everything at the wall" approach, you're limited your focus so you can mastery a limited number of tested concepts.
You should ALWAYS be working on RC, even for 15 minutes/day. It takes the longest to master, and you can't ignore it for a few days and then do 4 hours of it expecting tremendous improvement.
So your list after one CAT might be:
RC - Main Idea
SC - Parallelism
CR - Strengthen
Choose whatever concepts you missed the most on your CAT or you feel the least comfortable with. Utilize resources from GMATClub, Beat the GMAT, your OG, and your old books so you can cover each concept from many angles.
Here's an example of how I approach CR:
https://gmatrockstar.com/tag/gmat-critical-reasoning/
And RC:
https://gmatrockstar.com/2015/03/13/conq ... -question/
Even if these strategies aren't for you, come up with a way of utilizing your scratch pad in a way that allows you to get above 90% accuracy when you work untimed.
Good luck! You're really close to a 550, you just have to get organized, practice in a smart way, and work on codifying your approach to every question-type.
Best,
Vivian
