The four languages are French, Spanish, German and Dutch.
1. French - intermediate level. I'm from Canada, and thus French is a useful language to know, especially being as I'm considering graduate school in Montreal. As well, short-term-wise, good to get jobs in eastern Ontario as well. I will also be spending roughly six weeks in rural France next spring.
2. Spanish - intermediate-advanced level. I have no real particular need to know Spanish, besides the fact that I'm going to be in rural Spain for five weeks next spring, but I find it way easier than French, and believe that if I could just beef up my vocabulary and get some more complicated grammar straight, I could consider myself almost fluent in it, so that would be the draw there.
3. German - beginner. This I want to learn because of my future career plans - I want to be a professional genealogist, specializing in Eastern European and Benelux genealogy, and being as various German empires controlled much of Eastern Europe over the centuries, many records are in German. I will also be in Germany and Luxembourg for about two weeks in the fall. Also, right now I'm living and working in a remote corner of the Scottish Highlands, and one of my co-workers is German, so this could be an opportunity to practice. Others practice German with him, and he enjoys helping others with German, so I know he wouldn't mind.
4. Dutch - beginner. Same reasons as German, and I will be in the Netherlands and Belgium for about three weeks in the fall. I have no Dutch-speaking co-workers, but I do have a South African co-worker who speaks Afrikaans, and she says that she can understand most Dutch. Though I'm not quite sure of how pronunciations could potentially differ here, so I wouldn't want to confuse myself too much.
Advice? I have learning materials for all of them, but if you have any specific suggestions, feel free to add them.