I just passed the CCDA this afternoon, which wasn't too bad. For studying I used the book (Official Cert Guide) as a guide, but honestly I've found that just using the Cisco web site (white papers and technical guides) is a better resource than most of the books, not to mention are free. I also used Boson ExSims over the last week just to reinforce the materials.
At any rate, before I go out and by anything for the ARCH exam, is the Official Cert guide worth it? How are the INE CCDP videos? For those that took the ARCH test, what did you guys use to study? Thanks!