Here you go Theo.

http://www.wasteless.org/Eye_articles/ciggarettelitter.htm

 Quote:
Alternatives for smokers:
� �Field stripping� cigarettes is a technique taught by the military. After extinguishing a cigarette, roll the paper between your fingers, removing the remaining tobacco. Put the paper and filter in the cigarette pack, or between the pack and cellophane, for later disposal.