English courses

Not only are some English modules excellent for helping you develop that story-writing side of yourself, there's also a whole lot of information about the publishing industry that can be learned here. Yes, the basic principles of publishing are the same for books, music and games, so a good publishing course will equip you to deal with publishers on a much better footing.

Personally, I'd recommend getting to know the publishing / English students through the first-year art modules you take, they'll probably be in those. Then once they start talking about things that interest you, start sitting in on the odd lecture.

Psychology courses

A little bit of psych can be really useful in helping you decide how to invoke powerful emotions with your games. Unfortunately most 1st year psych modules are very low level, but if you feel that you're learning something applicable, go for it.

Usability and Human-Computer-Interaction courses: Most informatics faculties will have a few courses dedicated to these fields. In the gaming sphere, the most important person you're ever going to interact with is your user – the person playing your game. Any techniques and skills you can learn to make their experience better will translate into success later, even if you're simply a programmer...

While these courses are most useful for aspiring game designers, learning the ins and outs of usability will make your code better and less error-prone, despite what the hardcore CompSci guys say about it. Trust me. Being able to make a piece of software fun and understanding WHY it's fun will serve you in good stead.

Regular courses

Most CS degrees will have you doing at least some maths. Go to it and work hard; you can do ok without it, but knowing your algebra makes graphics coding much, much easier. Trying to understand AI without combinations, permutations and some calculus will break your head.

Don't run away from the physics course. It's not as hard as you think, provided you keep working on it every week... It'll help you out in the days of physics cards and emergent gameplay.

There are tons of other courses which might prove useful. Remember that you need to sit down and decide what you should focus on and what not. Your degree will try to push you towards certain things, but remember that this is all for you to use – get the most out of everything you can.