We had our first session last night, me being the GM. One player made a high elf / boatman character and inspired by the picture on the card gave her character a pipe smoking addiction. I thought this could be an interesting case to deal with the stress -system. Something like..
During a rally step, smoking offers a chance to get rid of one extra stress token ( maybe an easy WP check here? ).
If the character runs out of tobacco or it gets wet, he's never able to get rid of one final stress token until he gets his dosage, this might affect the character's mood enough to add one token to the party tension meter as well.