The challenge today on the Quiltart list is to post pictures of jewelry we've made, presumably with quilting or sewing techniques. So I'll chime in.
I like to make embellished cords by machine-zigzagging over a cord or bundle of cords. It's easy to use metallic threads by putting them in the bobbin. You can string beads on the cord, before, after or during the zigzagging, or make bobbles by stitching over and over the same spot. You can join cords by holding them together and zigzagging over the whole bunch. If you want a bead to stay at a particular spot on the cord, just tie a knot or make some bobbles beneath it.