Oh, Beez - I know first hand, one of their favorite things to find in their frig is something mom has made and brought from home!
There was a list last year like this that was so helpful to me. I remember one thing that had never occured to me were flip-flops for the shower!
I bought an over the door hanging rack (had three hooks) that came in very handy for jackets, etc. He would actually hang his towel up too!