One of my professors gave the "picking a major" speech on the last day of the semester, and he had some good stuff to say, so I'll tell you what he told me. When you're picking a major, think about two things:
1) What you like, or what interests you. It sounds like you've got a good list already with regard to careers, but even go beyond that and just think about hobbies or other types of interests you have. Your major should involve something that you'll feel good about pouring your energy into, but it won't necessarily be your career field. For instance, I'm a pilot and flight instructor, and plan on flying for a living, but I need a four year degree. My major is political science, just because it interests me and I'm willing to spend the energy studying it, and besides, I actually enjoy talking about politics and that sort of thing (crazy, I know)
2) Something you're good at. Think of things that you're really good at. There's nothing wrong with majoring in something you're already good at, because at least then you'll have a better chance of being successful and enjoying yourself.
Make a list of things in both of those areas, and try and find a major that your school offers that involves something that's on both of those lists. I can tell you this strategy worked for me...