Waste Knot - Starting a new thread
Make a firm knot at the end of the thread. From the front of the canvas, make a long stitch (shown here dotted) from the direction in which you will subsequently work cross stitches. Make several stitches being sure to stitch OVER the leading thread on the back. After several stitches have been completed, cut off the knot on the front and trim the floss close to your work on the back.