MyPlan has several assessment tools available including a personality test, career interest inventory, career skills profiler, and a career values assessment. There is also a 'majors' tab that includes a resource callsed "What can I do with a major in....?" that can help match career assessments to a potential major or vice versa.
To access MyPlan:
Check the departmental webpages. Almost all of these pages will highlight the research activities of the department, profile the faculty etc.. This can be a great way to learn more about your potential major. Look for the links to Research and Faculty. For example:
Use our Research Guides to see what faculty in your potential department are writing about. We have guides for just about every subject taught at MIT. Use these guides to find:
Urban Studies, Planning & Real Estate Librarian
Literature, Theater Arts, and Writing and Humanistic Studies Librarian
Aeronautics and Astronautics Librarian