The American Osteopathic Association (AOA) has provided a number of resources for students. Here's one that will serve as a resource for you throughout your osteopathic medical education:
Time, Tactics and Truths: A Guide to Making the Most of Your Osteopathic Medical Education
AOA Opportunities is the official site to locate Osteopathic Medical Internships and Residencies
Student Resources from the American Osteopathic Association