I tie a number of quilts. I make some from jeans/Dockers material and they are a little thick for even machine quilting, so I tie. I like the poly yarn because of the way the ends fray. And for the jeans quilts a bright red provides a nice focal point. For the current quilt I am doing, I am using light blue crochet string because I didn't want the ties to be a focus. When you thread your needle ... probably it will need to be a big darning needle, even up the ends. Then there can be two strands of yarn to make the tie ... do not cut. Tie a square knot as they stay better. If at all possible, start the next tie before cutting the yarn. If you can do the ties, then come back and do all the cutting later ... it will save you motion and be a lot faster. Picking up/putting down the scissors wastes time. Having the yarn not cut each time also helps me keep track of which way to tie for the square knots.