The database Career Transitions is a good place to start looking for an internship. You can search by location and/or key word. Career Transitions uses the Indeed.com search engine mentioned in this video.
The Library also has:
All Work, No Pay
Finding An Internship, Building your Resume, Making Connections, and Gaining Job Experience
Berger, Lauren (Book – 2012)
Intern Nation
How to Earn Nothing and Learn Little in the Brave New Economy
Perlin, Ross (Book – 2012)
The Internship, Practicum, and Field Placement Handbook
Baird, Brian N. (Book – 2011)
For the Hollywood version:
