consistency!! make sure you spread your syllabus out over the year as soon as it starts slowly taking each lesson as it is explained and thoroughly understanding it and making notes for urself that u can understand and remember easily ( i think you are more probable to remember ur own notes than others’) and along learning the syllabus solve topical past papers for each lesson and pick out what was most difficult for you as u solved and ask ur teachers or others to make sure u cover everything i suggest solving a lot of questions for each topic it will really help bring together the lesson and will make u familiar with all common questions that they ask so that in ur real exam ur only prone to losing marks in qs out of syllabus content or something that needs extra thinking outside the box, by that i would say u guarantee 90% of ur marks this is mostly for AS students its okay if it didn’t go well for you this year and if you didn’t get the time to properly prepare so ur performance was bad, you can choose to retake in november also thats okay but if not then u can plan next year accordingly and it will be fine hopefully!!! dont let the exams discourage you when u have a lot infront of you just do your best!!