The way you study makes a difference in how you achieve the scores. First of all, if there is a time gap between each subject during exams, then it is to revise, not to learn new topics. Unless you are that extraordinary student, you will forget other topics if you try new things before the exam. So, we highly recommend you to prepare months before the exams occur.
On the other hand, students should know what they will face inside the hall. Most of the attendees fail to score good marks because they had no idea what to read. Therefore, if there is enough time left, just outline the main topics for your subject. Check out the old question papers such as old is gold, DLE, and get hints about the possible upcoming questions to prepare.
Moreover, stay away from alcohol, smoking, video games, mobiles, and social media during the time. While you study, forget about the past or future, because they are just imaginations in your head. The past is already gone, you cannot change it, there's no control over the future, but the present is the only thing that should matter to you. Go deep into the topic, be conscious about what you are doing, and ignore the outer third world.
If you are stuck in a question, don't give up but try again. There are plenty of tutorials online, youtube videos, as well as a messenger where you can call your friends and teachers for help if you need it. The teacher will actually feel honored and respected if you call him/her for a solution. So, don't be scared to ask your gurus and never leave any question until you solve it by meaningfully understanding it. So, these are some of the tried and tested methods to get good results in SEE.