Okay, time to post my preparation details.
I started in earnest in early June with a couple of diagnostic tests. I quickly realized that I needed to relearn a lot of Math concepts and prepare for verbal from scratch. I immediately ordered
Kaplan 2005 and
Princeton Review from amazon.com.
I figured that to get a high score (750+), I absolutely needed to get a 50 or a 51 in Math. My knowledge of the basics was still in the back of my mind, so I first had to get that out. I then bought Kaplan's
GMAT Math workbook, older edition from my friend, and did all the problems there and I mean all of it. I did this over a weekend. This got me back in the groove in terms of the meat and potatoes GMAT problems - algebra, basic number properties, word problems, rate/work, geometry etc.
I then realized that I had to take on areas that are not covered in any of the standard books - permutations and combinations, probability, basic statistics, set theory etc. I'm a kind of person who is uncomfortable without studying atleast one book to get the concepts of any topic. Learning by jumping in and solving problems is not for me. So I scoured the net, libraries etc. Here is what I found:
1. For Permutations and Combinations, there is no better book in the whole wide world than
Higher Algebra - by Hall and Knight. This is book decades old but it is a classic. Any decent college library should have it. A library near my place had it in the reference section, so I just went there and took notes.
2. For Sets and other Word problems - The
Manhattan GMAT Word Translations guide is very good. I used this book.
3. For probability and statistics, I had to scrounge a few websites and make notes myself. But once I did that, I began solving problems.
4. For number properties and inequalities, I found this superb e-book from
4gmat.com For just $6.99, I strongly recommend this e-book. You can only use it in the computer you by it from and cannot print it out, BTW. But it is worth every penny nad give you a boost for a wide variety of LCM/HCF/Prime/reaminder and inequalities of every type including the notorious ones with modulus and quadratic functions. The e-book also gives a bunch of shortcuts to to multiplications etc. which were very useful to me since I've gotten used to my calculator a bit too much.
Concurrent to this, I started taking part in discussions here and did all the challenges I could. Once I got access to the old ones, I did many of them as well. I cannot over stress the importance of the GMAT Club challenges. . If you can consistently get 30 plus in the challenges, 51 is yours to lose in the real test. In fact, the day before the test, I went back and did one super tough challenge (#22) again. My kudos to the GMAT club team for coming up with consistently tough and diverse sets of problems.
Towards the end, I started with the OG after doing my Powerprep tests. To be honest, I only did the ones identified as "hard." I felt that it was more useful to do the challenges than to do a bunch of easy bucket problems even if they are from old tests. I also regularly did the mini tests for PS and DS in the Kaplan CD. I topped it all off with a serving of Kaplan 800.
All along, I had noted down problems that always gave me trouble and the day before the test, I went through all of them again.
I'll post my verbal preparation details in a bit.