Been over a year since I got my CCENT, so it was time to get my CCNA.
Passed with 947 score. Took 31 days of studying. Used the following materials:
Books:
CCNA Study Guide, 7th Ed by Lammle
Cisco CCNA Simplified, 3rd Ed by Browning
Complete CCNA Study Guide, 2nd Ed (free PDF file) by Hoong.
Video:
CBT Nuggets
TrainSignal
VTC.com (quite good!)
You won't pass without hands-on experience. So, do the labs.
Next certification to get is Microsoft's 70-642, Windows Server 2008 Network Configuring (really CCNA in disguise). I already have my Microsoft MTA in Server anyhow. Time to get a MCTS.
If I can pass, you can pass. Just study until your brain bleeds.