Contact the department(s) of interest. Faculty will help you make the most informed decision, so ask plenty of questions.
Review departmental materials including the specific steps for applying. This varies based on the program and department, so review the information closely.
Begin your application process online with the MSU Graduate School. You can always save your online application and return to the website to complete the application as you collect all the necessary materials. Due dates for applications vary from Dec. 1 to the end of the calendar year, however, earlier is better.