Practice a lot: To excel in this exam it is important to practice a lot. One of the most important ways to crackGMAT is take as many mock tests as possible. You can take mock tests from this site. It will also give you the idea that how much time you are taking to solve a particular section. While practicing the mock papers you can also do time management to attempt all the sections of the exam.
Attempt fist five questions well: The initial few questions in GMAT exam determine the level of question you are going to handle in the exam. Once you attempt the initial few questions the computer will automatically adjust the range of question to fine tune your score. So it is really important that you will give right kind of replies to your first five questions which might prove decisive for your exam. Always cross check your answers before moving to next page and section.
Try to complete the exam: Always set a goal that you will try to complete all the sections of the exam. If you will fail to complete any section there will be negative marking for that, so make sure that you will attempt all the questions and complete all the sections well.
Do not waste time: It is always suggested that do not waste time during the exam. If you are unable to solve a particular section or a specific question then move to next segment without wasting much time. It is always good to come back to such questions once you answer all the sections. Do not go back to help page again and again it will consume lots of time.
Read all the questions carefully: Always read the questions carefully before choosing the right section. In multiple choice questions you will find wrong answer as choice for your answers. Before selecting the right choice make sure that you are selecting the right option. The wrong answers are deliberately designed to mislead the students.
Avoid random guessing: The pattern of the exam does not allow aspirants to go back to the previous page as you can do in the paper based exam. It is important to answer each question before you move to the next button. It is always suggested to make the educated guess rather than making a random guess even if you lack time.