1. I am keeping an error log
, but not sure at what time intervals I should review the log. I have used pretty much only MGMAT materials and have also used the GMATClub Verbal book. I would review your error log before every study session. If your error log gets too big you can review half of it before each session. Also, be OK skipping 5% of the questions in your review if you find them too difficult. Let's focus on the important 95%.
2. I've got the OG books and have used those as part of my study plan. OG 13 should be the center of your studying. You can also use the Question Pack 1. Between those two you have a lot of material to work through.
3. I have only taken one GMATPrep before I started my studies and scored a 540 (ouch!). Before your next exam I would consider taking GMAT Prep 1 and 2 twice each and the Exam Pack 3 + 4. These are excellent resources.
Also, if you have any thoughts on timing, I would be greatly appreciative to hear them. I was planning on taking the test in late June and again in late July. I want to break the coveted 700 mark, but I think I'm cutting it too close. I think that a lot of improvement is possible in this amount of time. Making a study schedule will help you get the most of it. Really try to break down your studying by the day. For your timing, practice as you would take a test. Treat every question as a test question. Get into good GMAT habits starting now. Be organized. Be consequential. Studying can be very tiring so give yourself a break when you need it - it's better to rest and re-charge than to study when you are exhausted.
Let me know if you have any questions!
PS: This article on GMAT Study Habits
might be helpful. There are a few points about error log
and your timing during practice.
"It is a curious property of research activity that after the problem has been solved the solution seems obvious. This is true not only for those who have not previously been acquainted with the problem, but also for those who have worked over it for years." -Dr. Edwin Land
GMAT Sample Questions to assess your GMAT Quant.
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IMPROVE YOUR READING COMPREHENSION with the ECONOMIST READING COMPREHENSION CHALLENGE:
Here is the first set along with some strategies for approaching this work: http://gmatclub.com/forum/the-economist-reading-comprehension-challenge-151479.html