For my verbal
error log, I would do 20 SC, 20 CR, and 10 RC. Trying to complete all 50 questions within 1 hour.
So once I was done with the 50 problems, I'd go back and check my answers. If I missed a question, or if I notated on my log that I guessed for that particular question, I would write down what I had trouble with in the comment column of my
error log.
So for SC, my comments would be something like: Parallelism, idiom: unlike x, y, etc.
For CR, same thing. In the comments column I would write down something like: weakness, strengthen, assumption, etc.
And then rinse and repeat for RC. I'm really not sure how effective an
error log is for RC. However, it did force me to keep practicing RC--something I would have probably avoided if it weren't for my
error log.
Once I started using an
error log for quant and verbal my score really started taking off. During my final month of studying I was completing 1 verbal
error log and 1 quant error, and reviewing my mistakes, every day. This took a lot of time but I think it was the key to my success.
However, the key to all of this would be that I'd spend a couple hours each week going through my past error logs, analyzing my comments, and identifying problem areas. I would review each of my wrong answers from the week prior, and if I noticed a pattern (i.e. I'd keep missing weakness questions), I would spend as long as need be to gain mastery of that concept.