Once you begin to master the academic topics of the GMAT, you should work on developing your test-taking skills. Since the GMAT is a timed exam, you must develop a time management strategy.
You will have about two minutes to answer each question on the Quant section, and slightly less than two minutes per question on the Verbal.
A tactic you can employ to develop your time management skills is to group five Quant questions together and spend no more than ten minutes on them. For Verbal, give yourself nine minutes to answer five questions. You can use this strategy on both practice questions and simulation exams.
If during a ten-minute stretch, you find yourself falling behind schedule, make a strategic guess or two to catch up. Make strategic guesses on questions about which you aren’t confident or that would take you much longer than two minutes to answer. By making strategic guesses, you can recover precious time that you can spend on questions on which you have a better chance of answering correctly.
To sum up the basics of time management on the GMAT: keep track of your time, and if you start to fall behind, make an educated guess or two to ensure that you will not run out of time and leave questions unanswered.