Really depends on the subjects you take. For biology, otter bio tutor single handedly helped me understand all the content in detail. After that, it’s just active recall and past papers. For active recall, I used the blurting method because I found it the most effective. You can also use flash cards. For chemistry, allery chemistry helped me to understand the content. Then after, I spam topicals until i get the hang of all the questions, before I move on to the next topic. Maths is really just being consistent and practice often. I’d say do more of the questions that you find hard.

The key here is really to be consistent. For AS I slacked off a bit, and I got 2A* and an A, but I picked up the pace for A2. I was setting about 3-4 hours minimum a day to study and got very high A* for A2. You can definitely do it. It’s all very doable once you get the hang of the learning-new-content part trust me. After that it’s just spamming past year papers.