Take any pencil (maybe one that the eraser is completely worn down) and wrap foil around it. You can add glue to help hold the foil in place but I had no problems without it.
Completely cover the flat end. This is the part you wright/draw with. Flatten the foil by tapping the end on another surface.
Use to write, draw, touch small icons etc. I used my new stylus to make this guide : D