Books

Beginning Active Server Pages 2.0
If want to learn ASP easily, we couldn't recommend a better book. It covers most topics clearly and has you up and running in no time. Webslinger was using ASP in less than 24 hours because of this book!
Professional Active Server Pages 2.0
Published by Wrox, the same folks who brought you "Beginning Active Server Pages". This book details more advanced topics will real-world examples.
Active Server Pages for Dummies
As always, the "For Dummies" series makes things really easy to learn, but they sometimes leave you hanging when it comes to more advanced topics. Beginning Active Server Pages may be a better choice if you've programmed before.

Web Resources

ASP 101
A great site with great example scripts.
ASP Resource Index
The mother of all ASP sites, if this site doesn't have, it links to one that does!
ASP New Group
When you need help from the experts, this news group can help!