The first two years of study at Princeton are a time of exploration. Try out courses that intrigue you. You might be surprised by what inspires you. As you explore, you should also be able to complete most of your distribution requirements, while also taking courses that will prepare you for advanced work in more than one academic department.
Even if you came to Princeton with a strong interest in a particular field, it is a good idea to complete the prerequisites for more than one academic department. Because Princeton academic regulations allow students to use many department prerequisites to fulfill distribution requirements, you can use the distribution requirements to test out departments of interest, and we encourage you to do that.
It is also a good idea to sample courses in several departments that examine topics that interest you. Very often one can work on an area of interest from different perspectives. Buddhism, for example, can be studied not only in the Religion department but also in Philosophy, History, Anthropology, or Sociology. Make a point of trying out related departments. If you think you want to be a Politics major, take a course not only in Politics but also in Sociology, Anthropology, History, or Near Eastern Studies. Molecular Biology and EEB have much in common, but Chemistry, Psychology and even Anthropology border on these disciplines in some significant respects.
Finally, remember that no academic discipline can ever fully encompass the interests of a well-educated mind. There is a stunning variety of courses offered at Princeton, and you owe it to yourself to explore. During your first two years, you may well wander into a discipline that will unexpectedly captivate you and become your major department, and certainly, your continuing explorations will round out your education.