In my opinion, one thing that most system/network administrators are shielded from is the actual physical laying of the network which includes tasks like cabling, crimping and so on. But it doesn't hurt to acquire this knowledge right ? Who knows, in the near future, if you decide to wire your home to make it network ready, you can cut costs if you know how to do it yourself.
Bob Catanzarite has written a nice step-by-step guide on Structured Wiring where he explains how he wired his house and made it network ready. The guide is extensively peppered with photos. Bob touches on important topics right from the planning stage to tools used, designing the layout, to coax stripping and finally wireless networks. All said, a very informative site.