https://www.sciencenewsforstudents.org/article/top-10-tips-study-smarter-not-longer-study-skills, in summary:
Don't cram! Give yourself breaks and enough time to study.
Do practice tests and questions, don't just reread your notes
Focus on what you struggle with.
Use examples, mnemonics, songs, make mind-maps, anything to help you remember!
Put your phone far, far away from your study area.
http://www.educationplanner.org/students/self-assessments/learning-styles.shtml or https://www.how-to-study.com/learning-style-assessment/quiz-item.asp
Both of these quizzes helps you to identify your learning style (visual, tactile, auditory), which will most likely be some combination, and then they tell you the specific learning tools that are useful to your main style. This website also provides some useful information: https://www.rasmussen.edu/degrees/education/blog/types-of-learning-styles/
It's also a good idea to plan your study around your exams. This website explains how to plan everything out, and this one is a little more in depth.
Study Planner Templates
https://esa.co.nz/pages/2021-study-planner (this one is specifically based around the NCEA exam timetable)
https://onplanners.com/templates/student-planner (this has a whole bunch of planners, simply scroll down and select one that you like)