A few quick links for some good Microsoft Patterns and Practices information.
For webcasts and hands on labs check out www.pnplive.com
I found the webcast for the Enterprise Library Cryptography Application Block to be a good introduction to the topic, and I still have to check out the Exception Handling webcast.
Finally the Patterns and Practices Community site is a good source of information and support from fellow developers.
That's it for now... Enjoy.