Practice makes perfect permanent
It’s never too early to start on past papers… get a feel for the types of things the examiner will ask, see which topics come up over and over again… give yourself a head start…. some of the answers are deliberately ambiguous! Get used to crossing out the the obvious wrong answers so that you can focus on the remaining possibilities.
The best starting point for past papers is always your exam board, but failing that, you can try either:-
PapaCambridge for GCSE and A Level Business Studies & Economics past papers for Cambridge, AQA, OCR and CCEA boards going back umpteen years.
Physics & Maths Tutor for GCSE and A Level Economics papers for AQA, Edexcel, Cambridge, OCR and WJEC.
For the longer written answers – take a look at the examiners reports (also available from these websites) – see how your predecessors did… where were their weak points… what did they do well…?