I am looking toward my CCIE R&S certification, but am a little stuck on how to prepare for the lab portion. I have 5 years experience and all but one of the CCxP certs, and have passed the written. I have a decent lab and a stack of the CCIE books, but I'm not sure they provide enough material. Several companies out there sell lab prep workbooks. Is this the way to go? Can anyone offer any other advice? Thanks!