Classroom lighting, make it automatically turn off when no one is there.
If disposable cups or plates are used anywhere, see if reusable can be substituted.
Start a web page on the school site, so that anyone who wants to put stuff up for free can do it, before throwing it away. Kind of like freecycle or craigslist, but just for the college. Maybe that's what you meant by re-use shop.
Compost food waste with vermiculture.
Compostable napkins and utensils.
Hall lights in dorms turn off automatically when no one is there.
Distribute textbooks by Kindle, Nook, or similar devices. Distribute assignments by web. Turn in assignments by web.
Some classes given over the web to cut down on people driving to class.
Prohibit personal heaters in dorm rooms. Size circuit breakers in rooms so that they will blow if someone tries to use 1500 watts. Hair drying can happen in bathrooms, ironing in the laundry room.
Individual electric meters on dorm rooms. Use less, save more.
Less meat, more locally grown food in the dining hall.
Recycle fryer cooking oil into biodiesel for university vehicles.