you should probably look through some jobs to see what you like.. but you could maybe do a science or two, and 2 other subjects that you like, which leaves you open to a lot, cause there are a lot of jobs in science (esp if you pick biology and chemistry) and the other two are for if you want to do something else?
Definitely choose maths, it will help you in later life plus most careers need some kind of maths in it. Also, do something you enjoy. Like painting abstract art from all over the world or do you like watching people's behavior and studying mental diseases? :) Hope I helped...a bit.
All A-levels are hard.
Im doing AS-french and I got an A in GCSE's but i'm finding it real hard. it invovles A LOT of independant study.
Sciences invovle a lot of work, chemistry and biology is more about learning everything anf bio, is everything you learn but applied to situations.
Maths is enjoyable =D
But before this MAKE SURE YOU ENJOY EVERY ONE OF YOUR SUBJECTS, or you just wont get the motivation to work in them :) Hoped it helps :)