Though Studying Effectively for me had different methods for Different subjects but massively floated around notes and constantly writing important highlights and ignoring the usual normal things. When I say different methods for different subjects: I mean like Maths: I focused more on redoing my full school book like 6 times in a Half plus would go beyond and redo other similar standard books with more difficult and complex calculations to make the level higher where normal hard problems would become easier. For Literature: It was like reading the book, watching it in theaters and spending quality discussion time with some book worms and teachers.