Hi!
I got A in AS Sociology (my exam board was OCR) after getting an E in the mocks. I agree sociology is really tricky to revise for (I am not completely sure how I got A), but here is what I did.
1. Read mark schemes and tailor your answer to get the marks.
2. Do past papers.
3. Read model answers.
4. Learn no more studies/theories than you need to know. For example, if you only need five studies and theories on a certain topic like gender and identity to write a 20 marks essay, only learn five, but study them so well that you remember them.
5. Summarise the studies and theories in your own words. Keep the summary as short as possible, but do not make it so short that you do not understand the study or theory anymore. You will find that it takes no more than 10-15 words to sum up most of them.
6. Read all your short notes over and over again.
7. Try alternative methods of revision like flash cards; see which learning technique suits you best!
8. If it helps, apply the studies and theories to the real world. I did this for a bit and even used them as examples and links to the real world in an interview, which helped me memorise and understand them!
9. Stick to a schedule which includes at least a few hours of revision per week. Even if you cannot keep it up for long, it will still help a lot. I studied 6 hours per subject weekly for three weeks and came out with AAAB at AS, to exemplify. (I did not study much outside of those three weeks, the week before the mocks, and a few days before the exams, either.)
10. Stay calm and do not let yourself become extremely stressed and overwhelmed. Sociology does indeed have a lot of content, but said content also happens to be easy and logical, so you can definitely do well.
If you do this, you will already have fought a part of the battle. You can do this!
Best of luck, OP!