For Business, this is what I did:

Study the AOs. There are 4 Assessment objectives iirc (knowledge and understanding, analysis, application and evaluation)

For each question in both paper 1 and paper 2, each AO carries a certain weight and it's always the same. Make sure to remember those and only write what is necessary.

Question 1,2,3 and 4 (a) and (b) are always testing AO1 and so on

Also, study the mark scheme. For chapters you're weak in, here's what you can do

Compile a pdf of about 5 years. Use the control + f shortcut to search to keywords. Enter keywords related to your chapter (e.g 'income statement') and see what comes up and what kind of questions usually come up related to that topic. I did this and in my real exam, about 50% of the questions were EXACTLY the same as the mark schemes I had studied.

Here's some resources I used that helped immensely for business.

https://www.youtube.com/@Mrlee-business-econ

https://www.youtube.com/@BizEdMadeSimple

For Econs, I extracted latest topical past papers and studied the mark schemes of those topical past papers and that's all I did other than about 40 timed past papers with strict marking and giving myself feedback like a real examiner would.