Kitchen utensils. You remember forks and spoons etc easily enough, but there's always something that you forget that's actually really important. For example- tin opener, pizza cutter, ladle etc!
Can't believe the amount of people saying toilet roll! Our halls provide all that stuff... toilet roll, binbags, bed clothes (although I don't use them- I couldn't sleep with sheets etc that have been used by countless other people, even if they are washed every 2 weeks for you!)