Are you still putting masking tape on the end of your cording to keep your beads from falling off as your work? Bead stoppers are the perfect solution - they are reuseable, don't leave sticky residue, and the most secure method for preventing beading mishaps. Simply squeeze the ends to open up the spring and clip onto the end of your stringing material. The spring design expands to fit all widths of stringing material.
If you are in the business of making and reselling your jewelry or are an avid beader and have the need for a lot of bead stoppers (perhaps several dozen at a time), see my previous blog entry for an alternative idea.