Ok, thought of a few more.
A draw string bag is great for keeping shampoo etc in and a cheap pair of flip flops if using communial shower rooms (if they still exsist)
"we" (ie me and 5 other girls) used to share a wash for delicate items, worked really well we used pillow cases to keep everything seperate but these days those washing bags for delicates would work perfectally!
Washing machine tablets are a lot easier to store than loose power.
A hot water bottle (if they have access to a kettle) makes life a lot more plesant when your feeling stressed! used with lavender essentail oil sprinkled on the hot water bottle bag.
Bright colourful odd socks can be used very well to keep all cables seperate and stored descretly when not in use.
a good hair drier has 101 uses, drying socks, walming gloves up, etc.
I have to confess the only way we found of "preventing rehoming" of itmes in the wash etc, was to stay with them, we used to stick a few machine loads on at once and sit and study / chat / etc in the laundary room, again quite often sharing loads saved a fare amount of money over the year
Always have a box of Uht milk and coffee mate under your bed in case your milk has been "borrowed" nothing worse then finding some one has borrowed you milk and you can´t have a cup of tea or coffee! Same goes for packets of sugar.
Oh a bucket and detol will save a lot of heart ache if you have a room mate that will drink to the point of being sick.
A torch (yes really) can be very handy if you plan to use the libary late a night often uni grounds are very well light but there is always a bit somewhere which is dark the LED wind up ones form Ikea are fab, if its a uni spread accros a city then this is even more important
A travel mug, we used to decant the cheap uni coffee into ours, instead of drinking out of polestyrine cups.
Can i just add for the emergency boxes, cough medicine, san pro (a few different types will make a girl very popular in the middle of the night), vasiline, vicks and tissues (bitter experience there)
Hope all the people off to Uni soon, have a great time!