What are you weak at exactly?
Paper 1 ? Paper 2?
For Paper 1, essay writing, what Rooney_07 suggest would be a
good way to tackle the paper.
For paper 2, reading more and widen your vocab, so that you are
able to do paraphrasing, and to score in vocabulary.
As for application question and summary, you need to practice
your skills, by spending more time practicing past yr papers.
For essay writing, you need to show coherance. Your points must
make sense and relate to one another, and relate to a central
theme, which you raise in your introduction. You evaluate your
points, and show show it answers the question. In your conclusion,
you talk about the relationships between all your point and explain
how, together, it answer the question.
For AQ. give points from within the passage (minimum), and
suplement it with points and examples of your own. Format-wise, it
is a mini essay, and should have introduction, points and
conclusion.
Summary. Find the most important sentence, and try to use your
own words to shorten it, while still conveying the original
message.
The key to doing well is to give what the question asked
for. Often you get sidetracked while elaborating on your arguments.
SO, it is very important to reflect from time to time, while you
are answering, whether what you are writing have any purpose in
answering the question.