Having been TOTALLY inspired by Cherry, I have started doing my couch. I have done most of the upholstery but still have a bit to do.
AONB I have box cushions to cover and I watched this video over and over to help me, stopping it when it got to bits I didn't understand, and looking again till I got it and have come out with a really good cushion:
https://www.youtube.com/watch?v=453QuJnSTUw
The other video that has been amazing is this one on how to make a strip of continuous bias piping:
http://www.youtube.com/watch?v=dTWbRPv9HZo