As I've begun to build up my home network with more and more devices, I've needed to take careful considerations in the deployment of every part of it. Along the way, I've made plenty of mistakes.

Are you going to have TWO DSL providers into your house for redundancy ?. A good router and a couple of GigE switches. Cat 6 cabling for GigE wired ports and separate routed segment for 802.11b/g ...