I'd recommend you bring as many staples as you possibly can - especially while you can get your parents to buy them for you! At the beginning of the year, I bring up lots of cereal (which I eat a lot of), pasta (a couple of types, usually), rice, pasta sauces, baking ingredients, salt, pepper, oil - the really basic stuff. I then top this up throughout the year through shops or bringing more back from home at the start of each term.
If your parents are coming up with you, it's nice to do a food shop as well with them while they're around and get stocked up on fresh food too.