AS Level: Biology, Psychology, Sociology, English Language
A Level: Psychology, Sociology, English Language
I 100% recommend Sociology. I only took that subject because I wanted to do Psychology at Uni and decided Sociology would help me achieve this goal - but it quickly topped my list of my favourite subjects.
I also agree that you shouldn't take maths at A Level unless you are soooo confident with it - because the transition from GCSE to A Level is quite difficult.