things to do with worn out socks

If you have worn-out knee-high or calf-high socks, where it's mainly the foot-parts that are in bad condition, you could cut the foot-parts off, and then...

- Use the rest as leg-warmers or arm-warmers.

or

- Trim it to size depending on what you will use it for, and sew one end closed. Then you'll have a little pouch in which you can store a pair of glasses or a cell-phone. Optionally, for extra padding, you can double the sock over on itself and/or put one sock inside another, before sewing the end closed.