Paper and pencil helps. Knowing what all you are pulling for also helps. I love it that I have a basement and can just come up through the floor where I pulled Cat-5e for our UVerse boxes. Just pulled out four runs of Cat-5e that is no longer being used, due to removed a desktop, two were not being used, and changed our minds on the pull for what we were going to put into the Kitchen, since Wireless is becoming more of the mainstream for home networking.
Sad thing is, Satellite & CATV companies have not caught up to ATT and others using IPTV, that can use Wireless-N to send a HD signal to the set top boxes.