should I do a major and minor?

I actually pursued a double major and a minor in college. I majored in Economics and International Affairs, and minored in Geography. I wanted a double major, because both fields reflect my interests and I think the degrees complement each other and broaden my skill set. I received a minor, because a lot of the International Affairs courses I completed double counted for a Geography minor. In the end, I am very glad that I made these choices, as my current job relies on skills I obtained from both my Economics and International Affairs majors. I also think taking a variety of courses in different disciplines in college helps students to identify their interests (and disinterests) and which career paths to pursue.

Yes, you can.  It all depends upon how they relate to each other. For example, when I was in college I majored in Economics and minored in Finance because when I selected electives I choose investment related courses since they were closely related to the study of Economics. . Therefore it made sense to choose Finance as a minor.

That being said, others choose minors because they have an interest in another area of study but it may not be related to their major so it all depends upon a person's individual preference. Keep in mind you don't have to declare a major or minor when applying to college so keep your options open.