There is a large quantity of recommendations and advice which should help in every possible way with preparation for this important examination, number of tutors, textbooks, the software, training tests, etc. But all these pieces of advice often forget to mention, how much important to prepare directly to test pass, without dependence from its tasks.
 

GMAT is a test on a time basis with three different sections, and it is very important to learn correctly to distribute time, passing it, otherwise it is possible to do silly errors or a tested person would not have enough time for all questions. during a preparation to GMAT learn to watch time.

When you pass a course of training for GMAT or take training tests, measure time, it will help you to understand what to expect during the present test. Many think, that it is necessary to look at the watch after each question, but it just can negatively affect your efficiency. Your attention should be concentrated on calculations and careful perusal of questions, instead of on arrows of watch. Therefore it is better to check time, for example, after each ten questions, and it is even better - after everyone 20 not too to distract from direct decisions of these questions.

When you are assured, that you have enough time  to solve all the questions, the probability of successful pass of GMAT sharply raises. Therefore follow your developed strategy, look at watch after strictly certain time intervals, and concentrate only on the decision of problems - eventually, for this reason you have come on the test.