The yarn tail left after binding off should be woven into the work. Thread this loose tail through a tapestry needle and insert it through a stitch on the wrong side of your knitting.  Weave back and forth, following the path of stitches. After a short distance, change the direction of the weaving to ensure the end is tucked in securely. When finished, simply the excess yarn so it’s flush with the fabric. If you still have yarn left from your skein, try some scrap-busting crochet projects.