This is one of the worst things to do while preparing for GMAT (or any other competitive exam). In fact, forget preparations, Information overload has invaded all aspects of our life..But I digress...
Coming back to GMAT... I have decided to stick to only the following material for now.
- GMAT Official Guide (Lovingly called OG) : This is the bible, and is out in its 11th Edition now. I have a print copy of the 10th Edition, which will be sufficient. Not much changes between the two, so I have heard.
- KAPLAN : Have read great things about its Verbal.