I like 'anchoring' with SID - especially in a quilt with sashing. Then I don't have to worry about layers shifting in either the blocks or the sashing when I do the 'fancy' stitching. John Flynn suggests 'anchoring' with water-soluble thread in EITHER bobbin or on top. That makes it easy to remove when the quilt is finished if you don't want it to be permanent. Yes, water-soluble thread IS expensive, but it's worth it if that's what you want to do. Klue's idea of SID basting is similar - AND less expensive!!