Take the Vegan Challenge
Forks over Knives is the best documentary on the health case for a plant-based or vegan diet. You can order a copy from their website or from Amazon.
Making the Connection This Environment Films production (available free on-line) delivers “the facts in a relaxed and informal way. The film features eleven diverse contributors, which helps to maintain the upbeat pace and we included music from two Internationally renowned vegan hip-hop artists Promoe and Jah Sun to add to the contemporary feel of the film.”
Other great resources include the book Becoming Vegan: the complete guide to adopting a healthful plant-based diet by Registered Dietitians (RD) Brenda Davis and Vesanto Melina.
The Vegan Society has a useful section on nutrition.