its a good idea to be familiar with the mark schemes
sometimes theres a general formula that can be applied to most questions
if you find biz difficult, then i suggest you jot down your plan at the side so that your answer is organised
do practice past papers, but zoom through them
write down the answers and ideas in point-form and then check with mark schemes
and especially in this paper, DONT FORGET TO APPLY YOUR ANSWER. thats what gets you the high mark