I haven't read all of the answers yet, so someone may have already brought this up. Is your sewing room a room that you enjoy going in to? Would you go in there just to relax? How easy is it to work in? Are the colors of the wall relaxing or conflicting?
Now that my kids are grown and living on their own, I use one of their rooms for sewing and the other will be used for my quilting frame. I noticed that I really enjoy going into my sewing room. I have a tv in there, plenty of light, the color of the wall is a great color of yellow (relaxing but yet not too relaxing where I don't want to work). Sometimes I go in there, put something in the dvd player and just sew. Other times I go in there to fold clothes or to work on bills. It is my getaway. laughing...I can close the door and forget about all of the other work I have to do in the house.
Take a look at your room and check it out to see if it is a room that you enjoy going into.