Where to start looking?

How do you start looking for a career when you have no clue where to start? I'm starting my senior year of college and I want to make sure I have a job by the time I graduate. The problem is I still have no clue where to start looking. I went through college studying accounting and marketing, and I'm basically awful at both, just barely good enough to pass my classes. I only went into those fields because I couldn't think of anything else and some people told me I would be good at them. So I don't really know what or how to start looking for a job. I don't really have a preference to how far from home I have to move (I still live at home, commuting to school), so I'm not sure where to start looking either.