always time your self...say if you have five questions to answer
and two hours, ensure you have spend sufficient time on each
questions. Even when the time is up and you have not completed the
question,move on, its better to answer 75% of each questions than
only answer 3 questions in full.
moreover, such questions, esp writing questions, you almost nvr can
get full marks, so spend so much time to finish questions at
expense of the overall questions is stupid.
i use this method and almost always finish all my exams....this see
me through even my uni exams.