Not all people eat junk food constantly, especially in catered halls. I can eat in hall if I want to, which has meat and two veg type meals, but I sometimes make myself food too, especially lunches and stuff. As for myself, I never buy ready meals or take aways, but buy lots of fruit and salad, dried fruit and nuts etc. I got a juicer and smoothie maker for my birthday so am going to take that back with me. (though I don't think will be able to make juice for breakfast, it's so loud!) The only thing is fruit is so bloody expensive, but my parents would rather I spent a little bit more and were healthy than scrimping and living off baked beans! Some people may think you're wierd- it's a running joke among my friends that I eat more fruit in a day than they do in a week, but it's all light hearted. Most people won't give a stuff, don't worry about it!