For English Language
1. Watch Mr Bruff videos on You Tube, and down load his book if you can afford to
2. Mind map each paper, and each question on each paper, so you know what to do, and how long you have for each.
3. Mind map the technical devices and sentence structures, you need to know what they are, how to recognise them and the effect on the reader.
4 I used acronyms as well for no 3, which I found very helpful.
5. Read newspapers to see how the articles are designed and the language they use.
6. Read across the board - just different genres and from different eras
7. I also took the front page of the books and used them as a text for the exam questions to see if I could spot things.
8. LEARN WHAT DISCOURSE MARKERS ARE AND HOW TO USE THEM, Also INFERRED MEANING. These two give you high marks.
9. Remember the basics - how to write in paragraphs, sentences, recognise an adverb, verb, adjective, noun, adverbial phase and noun phrase.
10 Get to know the punctuation marks and how to use them. A fellow student in my class wrote them down in the column of her mock paper and crossed them off as she used them. I did that in my actual exam.
You may also find it helpful to know what you need to score for each grade, your teacher should be able to help you with this one.
PS I got an 8 with merit with the above.
PPS for the spoken exam do something you know well and include technical jargon - don't use notes if you can.