Hi,
5 months later my initial post in this thread and having not yet taken the gmat (bad padawan!), I would like to comment about the logbook.
I think it's a very important piece of information to have. Indeed as I am now back into the gmat business, I have gone through my old logbook and discovered some patterns in my errors, specially in math.
So I would advise people to have a logbook, but unlike some people say, do not print/copyNpaste every piece of detail you can. Just write down why you failed answering correctly the question.
I quickly noticed that in math, 70% of my errors were due to me making silly mistakes, like a + sign magically becoming a -, or missing a zero and what have you. It takes only a line or two to describe. I also noticed that I had completely forgotten about any probability concept, so I need to massively work on that.
Take away point: wisely use your
error log.
Beside that, I totally agree with the
MGMAT material, it is very good, provided notes are taken at the same time.