Besides the books mentioned above, do not forget to download the free GMATPrep software from This software contains the two best GMAT practice tests available.
Many people have problems on their GMAT because they have studied with the wrong books.
No matter how good your study plan may be, sometimes it’s just not enough.
For instance, hoping for a 200-point increase in less than a month of prep is unrealistic.
It’s also worth mentioning that a lot of people feel more comfortable on their retake because they have already gone through the whole process once and thus are more familiar with the testing conditions.
A method that I’ve personally tested when feeling anxious is taking a few seconds to “talk yourself into” ignoring the stress and trying your best under the circumstances.