I took English Literature, Biology, Maths, Further Maths, and Product Design for my initial AS choices. After a few months, I had to drop Product Design as it required so so SO much work, both inside the classroom and out. It was by far my favourite subject to begin with, but the heavy workload made me dislike it, which was a shame. If you're really interested in something to do with design, I would stick with it, but don't do what I did - don't pick it as a non-academic outlet, because it only adds more stress. Having said that, taking five AS's definitely contributed to the stress. English is a great subject, which I would recommend to anyone. It's extremely respectable, and universities will love the fact that it shows you are literate. Biology is a good science subject to compliment your others, but, like iscribbletoomuch said, Maths would be good to have alongside it. Unless you don't like Maths, in which case you'll hate it.
The short story is that you should take the subjects you enjoy. That's what I did, and I got good results (after dropping Product Design). You'll work hard at the things you enjoy. I think your options are good though! Psychology and Law are both quite niche and unless you're looking to go into either of those fields, they are quite limiting. It would be better to replace Psychology with Biology, and Law with Maths. I only suggest that because you are unsure what you want to go into, so keeping your options wide will enable you to do a lot of things at uni. Good luck, and don't stress! You can change them halfway into the year.