1. What's the conflict?
2. Encode that conflict in a physical element of the scene characters can interact with.
3. Don't use food or drink unless it's important.
Tina is getting ready to leave for a business trip, but Alex is trying to work her way up to a confession of love. Tina's packing the suitcase, Alex is dancing around her trying to continue their conversation.
Cigarettes, in terms of blocking, are even worse/better: all the benefits of drinking, plus FIRE








