I got a stocking order last week for a friend's family. All of them were to have the same background pattern and then personalized tops. As it happened, I had a whirlwind trip to Chicago this weekend with The Singers MCA, which included 12 hours of bus riding. Since I wanted to maximize my productivity, I worked on all three in a long tube. I worked the foot portion and added in holder yarn for an afterthought heel, then when I had enough length I broke the yarn and worked one row of extra yarn so I could come back later and work the remainder of the stocking.
(Christmas came early, I got a new camera, but I hit a snag. Funny story: we have two usb ports on the computer, but I need the camera, the mouse and the Wi-Fi connections to upload photos... I'll put my tech support on it when he gets home)