In the real test it is very important to finish all questions in a section. GMAT punishes severely to a test taker who miss few questions in the end. And you can not skip any questions as it is computer adapated. So the best bait is to finish all questions in time and give all questions more or less equal time. You will run out of time only if you spend more than 3 min per question in math and 2 min in verbal. So your best strategy will be to manage time per questions and it becomes second nature by practicing more tests.
Nobody dies a virgin, life screws us all.