I mostly do straight line quilting. I get masking tape the size of the width I want, and stitch along the sides of the tape. I remove and use the tape over until it can no longer stay on the fabric. I have to be careful not to stitch on the tape as it can make the needle gummy. If that happens, I just stop and "de glue" what is stuck on the needle. If quilting curves, I use one of those marker pencils that you can just brush off the marks on the fabric.