If you are still at the stage of wondering what to do at university, or you want to make sure you have covered all the possible courses that might be suitable for you, then one very useful site is UK Coursefinder.
It has an online questionnaire (similar to the Stamford Test that you may have heard of that used to be on the UCAS site but is no longer available). You just answer a series of questions, taking no more than a few minutes, and it suggests a range of course areas that may suit your interests and skills.
One thing that keeps cropping up each year I am involved in the UCAS process is that many students assume that to do a course at university, you must have studies that subject at A-level. For some courses this is true, but for many it isn’t, so don’t dismiss any subjects that the questionnaire throws up just because you are not studying that subject now.