Other than the business courses mentioned by others...
Technical writing courses, if available, are invaluable. Being able to write and explain things clearly is an amazingly helpful skillset to develop.
Linguistics classes can be useful for helping you think about both computer and human language construction and use.
Engineering courses can help develop problem solving skills.
On any classes you take, I'd try to dig up syllabi from previous semesters to see if they're worthwhile (try to find the same teacher/course combination).
Comments
Other than the business courses mentioned by others...
Technical writing courses, if available, are invaluable. Being able to write and explain things clearly is an amazingly helpful skillset to develop.
Linguistics classes can be useful for helping you think about both computer and human language construction and use.
Engineering courses can help develop problem solving skills.
On any classes you take, I'd try to dig up syllabi from previous semesters to see if they're worthwhile (try to find the same teacher/course combination).