10A*, 1A. My main tip would be learn the specification. For a lot of subjects which are knowledge-based (science, math, geography, etc), the questions are only going to be things on the spec. Once you've got the spec down, do past papers, but not the whole paper - skip questions you know how to answer easily so you don't waste time on them, and instead just do things you struggle with. If you're doing a language, download the list of vocab you need to know (exam boards usually have a ~20-page list on their sites) and learn that.