The CCNA is worth doing but make sure it's the new course.
If you're doing it at home/downtime at work then get a CBT nuggets subscription as it's also give you access to the Microsoft videos as well for doing an MCSE etc.
Todd Lammle's book is worth getting as well as it's really good. If you want lab gear give me a shout as I've still got some left from my CCNA lab.
And don't practice on those nice switches I installed for you
