I print my label with my inkjet printer on either fabric I have used Bubble Jet Set on and ironed onto a piece of freezer paper, OR the computer printer fabric you can buy at Jo-Ann's. It makes it easier to hand sew onto the back of the quilt if you use lightweight fusible interfacing, cut the same size as your label and sewn right sides together. Snip a hole in the interfacing so you can turn it right side out and using a press cloth, iron it onto the back of your quilt. That holds it in place nicely when you sew it on.
I think labels are a VERY important part of a quilt!