Couching is simply sewing a heavy thread in place with a finer thread. Its a retro technique, too, that was originally done by hand, but it works beautifully by machine as well. I use a zigzag stitch to secure the heavy thread in place.
bag tutorial - love this front pocket treatment!
Caitlyn Handbag sewing pattern by Betz White I like the peek a boo pleat idea
Circle Skirt Calculator - My Handmade Space
nice zipper tutorial with zipper tabs