I have started to do my machine quilting here on my Gated Community art quilt. You can see some red/orange yarn in a couple of spots. Those are "boo-boo pins". I learned this trick from Paula Reed. You tie some brightly colored yarn on a safety pin. If there is a spot you need to come back to and fix something, put a boo-boo pin there and return later. I use these all the time when I have to remember to do something somewhere on a quilt.