In you degree plan, it will say what all classes are required. In that it will say a minor is required, here are the accepted minors. Some majors are very picky about minors CS major might not let you minor in MIS, but that depends on your school. So you pick from the accepted minor, say Biology. You go over to the Biology dept, and pick up their list of courses required for a minor in Biology. Then you take the classes and fill them in your degree plan.