Advice for geo (I don't take the others tho sorry)
Recently I've been looking through my past paper questions and noting what got good marks. Then I do practice questions and apply the list of do's and don'ts that I just made. You could try that for exam technique improvement?
Key terms are essential in geography, I'd make sure you know the fancy names for things (e.g 'convergent' plate margins rather than 'destructive', or 'temporal' rather than 'over time'). If you struggle with those, check out other people's quizlet cards and revise key terms
Any specific questions for things you struggle with lmk!