I pull my threads through, knot them and bury them in the quilt bat. I use a large eye needle and run it along the quilt bat a few inches and then pull it out and clip the threads off close to the quilt at that point. I like the look of it better than back stitching. It takes more time but I'm not in a race. I do it as I go along after I have 5-10 ends to bury.