Prepare a headshot of professional quality. The photograph should be high resolution.
Prepare a resume that lists professional experience you have in the industry you are applying for.
Go to http://www.cesdtalent.com/divisions/go and choose either New York or Los Angeles representation. Geographically, the city closest to you is probably the best choice.
Chose your talent field, for example: acting, dancing, puppeteering. Contact the agency phone number listed in the tips section for additional materials needed for submission.
Mail your headshot, resume and supplementary materials to the agency.