Dab a bit of clear nail
polish on the screws on the side of your glasses to keep the screw
from getting loose. Also good to put on cupboard door screws to
tighten them up.
Dip the end of shoelaces in some to keep them from raveling.
Put on labels to smudgeproof them.
Put different colors on keys to distinguish. Also put a dot of the
same color on door locks to match.
Cover costume jewelry to keep it from losing its luster.
Use it as a band aid for small cuts. It is close to what hospitals
use instead of stitches.