I have experimented with different methods and have adopted my favorite and wanted to share. The basic concept is from Bonnie Hunter and you can read her blog here for her thoughts.
Just a take a piece of PREWASHED fabric and either use "sticky" fusible or lightly iron to fusible, cut to 8-1/2" x 11" and print the label on my INKJET printer. You will need to set the ink with a HOT iron without steam before washing. I have been doing this as I fold the label over.
I have a standard template that I use so that my label is in the correct spot every time (unless it get stuck as in picture to).
This method gives you a professional la el and will allow future generations to know exactly where the quilt came from.
Now, Let's GO! Quilting!