Feeling like got to fine tune ours.
Along the lines of:
We are kind and helpful to each other
We only watch 45 mins of telly a day (little children)
We don't have chocolate or ice cream every day
We don't get up after stories and sleep time
We tidy up after ourselves
No means no.
Thinking keep it simple and go from there.
What are yours (so I can nick them) and what works and what's hopeless?