Over the years I found courses useful in areas I never thought they would. When in school I hated accounting and never thought I would have any use for it, because I was going to work in marketing. I certainly was wrong. What I learned during my accounting classes certainly helped me many times over the years.
Map your career with your end goal in mind, while at the same time pursuing work for which you have true passion. I know this isn’t unique advice, but when you get about half way through your career it dramatically has more meaning.