I am assuming that switching her major about not knowing what she wants to do for a career rather than simply wanting to stay in college forever. Perhaps the way to get her to find a "major" so she finishes her degree would be to suggest a liberal arts major.  This would give her the flexibiliity to explore her interests and still work toward earning a specific degree.  If that's not an option, then I suggest asking her well thought out questions, that will help her find the answers herself.  1.  What do you enjoy the most?  2.  What do you like about it...  3.  What kind of jobs are available in that area?  4. What kind of life style do you want to have...  Another idea is to suggest that she do an internship for a semester.  Internships can immerse a student who is flip-flopping into a concentrated focus for a semester and ultimately help her set her direction.  They also tend to be worth a ton of credits so she can get a lot of credits under her belt through the internship and sometimes you can find internships that will count towards credit to two degrees: ie Political Science and Environmental science as a intern in state government in the health department might count toward a political science degree and an biology degree.  Then she'll also get a taste of the real world and perhaps grow up a little in the process.