you could make cool campus/bar/party/frat/* shirts, clothes, etc silk screening is a pretty easy DIY endeavor
how about a wake up service? either via phone/email/txt or for us troublesome oversleeping underachieving types you could go pound on their doors - if you became friendly enough with the Floors RA's you could even get master keys and get access to the sleeping beauties. not sure if you have co-ed floors or whatever so you may have to keep it male/male female/female to actually get to the rooms
note taking for classes, especially the big auditorium intro classes where you could take notes for someone when they get hangovers...
no worries, I'm just throwing stuff out there - you could still do an email/phone/txt wake up service though
or a breakup service
or how many people have cars on campus? how many parking spots are hourly/timed? you could pull a george costanza and move cars for people so they dont get ticketed/towed (liability would probably be a ***** though)