Probably our first assumption would be that college students are going to be buying online. Also, that they are on a limited budget (sometimes) and need to find the bargains.
Not bad assumptions, actually. A recent Emarketer report says that their top reference is recommendations from within their peer group. Following right behind are the social networks and cost-savings coupons and ads online.
Less attractive, and sometimes downright annoying to them, are emails and cell phone ads.
Just offering some food for thought and sharing a little insight into a market you may want to investigate.