I live in a 200 year old house in Vermont, so cold is a very familiar part of our life. My sewing machine is in a relatively warm room, but the sitdown Sweet 16 quilting machine is in a cold part of the kitchen. If I'm motivated enough to quilt, I just wear heavy pants and a couple of shirt/sweater layers and try not to think about it. One thing that makes my sewing/living room more comfortable is a small electric heater that looks like a small woodstove. I got it at Home Depot for about $100 and for a few evening hours it makes the sewing room much cozier. I need to put the binding on two quilts I just quilted and usually I handsew the binding to the back. This covers my lap and keeps my legs warm, but this time I'm going to use a new technique to machine sew a double-color binding. Fortunately, I have plenty of quilts and throws around to keep me warm when I'm sitting down.