Seed Saving 101
Excellent page that gives basic instructions on how to save seeds.
A Seed Saving Guide for Gardeners and Farmers
This is a 30 page PDF from The Organic Seed Alliance. Requires you to enter an email before the download, but an excellent piece of information.
Seed Saving and Seed Savers Resources
A great set of resources, from how to save seeds, to seed exchanges, and more.
How Seed Banks Work
An introduction to seed banks from Discovery’s How Stuff Works, including a list of seed banks around the world