Sorry for the late response, I have only just discovered this post hidden among the list!
I did the same as you - fast-tracked the AS+A2 in one year with all four exams. Most exams now have an element of synoptic linking which is drawing a collected knowledge of all your ideas into one paper and having studied all the topics in the space of a year this will be far easier for you than your class mates who will have studied the topics a year ago. I found this during my fast-track, especially in the later months when it came to making links between ideas and theories in the crime unit that were covered in the education topic. HOWEVER, unless you ask your teachers to identify the topics to read around that are of most importance from AS ready for your A2 lessons then you will be feeling exceptionally far behind and worried - trust me, you think you won't but when it got to November I was honestly feeling the stress. Ask for help sooner rather than later from your tutors!
When it comes to revision, the following are vital;
1) Theories
2) Key thinkers
3) Their concepts
4) How it fits into the topic you are studying
START EARLY. START BASIC. Sociology is a theory based subject i.e. you have the main theories of feminism, functionalism, marxism, social interactionism and post-modernism. For a fast-tracker, by getting ontop of the theory will be so much easier as if you understand the theory, you can guess what each say about different institutions and different ideas i.e. crime.