Resources that are useful:
・EconPlusDal on YouTube covers everything coherently in a short duration and has a structure that works if your teacher isn't the best.*
・Physics and Maths Tutor Economics Notes: Covers the specification and gives some suggestions for further reading.*
・Tutor2U-Live streams are quite useful and give good examples and knowledge.*
・Read the news or Wikipedia on past events. Just search for the topic you want, and recommendations will pop up.*
・Expert Tuition Economics Practice Questions (Every question that's shown up is split into that specific topic, so it's easy to tailor and adapt to questions on specific topics.
・Go beyond the Spec with further reading or undergrad content (only needed for A*, tbh).
・Ensure you know all the diagrams. (Most diagrams allow you to add additional stuff to make them more relevant to the question, leading to stronger analysis.) However, this isn't needed in the DRQ’s or SAQ’s (assuming your Edexcel Route A).*
At the end of the day, it's just about putting in the effort to learn the content and structure. While being concise and completing the full paper. If you can do all of that, you will get an A*, and if you can do 70% of that, you'll get a B.