Obviously to increase your mark is to do past papers. With subjects that require writing is it best just to look at the question then do the answer in your head or put dot points and explain it to urself, then check answers and see if your rite? If you right it, you would only be wasting time and end of the day there is no difference. Obviously if you right it you are in exam conditions etcc, but personally l never have a problem with time unless its english.