I'm not really looking for a new technology or idea, more of a tried-and-true business model that fits well on a college campus/in a college town. My school ha

I'm not really looking for a new technology or idea, more of a tried-and-true business model that fits well on a college campus/in a college town. My school has around 14,000 students and I'm sure there must be some service I can provide them that they would pay for, but I can't think of what exactly.