Don't use dumps. The exam is really from the different VMware guides. Studying those and setting up a lab is the way to pass. I like test prep style question and answer study and bought the Test King package, but then read on these forums that it is considered a dump, so I stopped using it. For me one of the keys to studying was making sure I understood all of the terminology and concepts used in the vSphere world. You don't ever want to get a test question that uses feature words you don't know. I was also weak on storage technology, so I spent some time studying iSCSI and even set up an OpenFiler NAS server for my ESX lab to use as a datastore. That helped a lot. You don't have to be a senior datacenter engineer to pass the VCP, but you should be comfortable with all the common tech in a datacenter. Books are helpful for study, but nothing beats a hands on lab. I don't have the air conditioning for a server rack, so most of my lab was virtualized using VMware workstation to create ESX hosts in with a separate physical server for my vCenter instance.
I do some programming so I will likely write my own testing/flashcard type software and just fill with material from the guides for the VCP 5. And of course the home lab will get updated. 
