wolfcub do you have a playpen? When AwesomePup gets bitey that means he's tired, so we pop him in his playpen with a chew (a yak chew was his favorite at that age) and he whines for a couple of minutes then goes off to sleep. He goes in there while we eat our dinner as well, and he's definitely made the association. When he sees our dinner coming out he goes into his pen, lies on his bed and waits patiently (for a minute at most) for his proper treat of a pizzle, beef tail or lamb braid (all suitable from 12 weeks).
Today we've been working on not growling at people walking past when we're out. It's a work in progress. The growls are shorter and quieter than they were yesterday, but he's still growling.