I just finished a raggy flannel one for my daughter (seemed to take forever and it's heavy). I did a serpentine stitch all the way around the inside and then down the center all in one trip; locked the stitch and then stitched the other diagonal locking it beginning and ending. I have thought of also doing a quilting motif on my embroidery machine on them, so anything would work. But the embroidery would be a LOT of work. So I've not tacked it - yet. Good luck.