To prepare for the GMAT exam, it is important to follow through on a few different tasks. Before sitting for the exam you should first become familiar with the test format. You should also be familiar with the types of questions that will be asked on the exam. Many students struggle unnecessarily with the data-sufficiency questions in the Quantitative Reasoning section simply because they are confused by this original question format. For this reason, you should be sure to include some data-sufficiency practice as part of your GMAT prep. There are a number of different sources for information about the exam structure and practice questions.
Many students find it helpful to take a full-length practice GMAT under simulated testing conditions. This is perhaps the best method of GMAT prep. Students who take an entire simulated exam find they grow used to the time constraints in each section and thereby are able to work at an appropriate speed, one that allows them to consider every problem carefully without lingering too long on difficult items. In most cases, students learn that it is better to make an educated guess rather than wasting time thinking and rethinking a troublesome problem. A GMAT prep program that includes structured encounters with real exam questions and scenarios is ultimately the most effective.