I wanted to thank Paul Browning of http://www.howtonetwork.net for pushing me over the edge and helping me pass the CCNA.
I used the Odom books as well as Chris Bryant's excellent study guide. But, I had failed multiple times. My hangup seemed to be subnetting - I wasn't fast enough.
Paul's subnetting chart finally clicked for me! I actually did some subnets in my head during the exam, which is beyond what I would have thought I could do. (I have an English degree - I've always stunk at math!).
Anyway, I recommend his site if you are are looking for good, succinct material, including configuration videos and other tools.