how we use words in making rules, especially with kids in the concrete operational stages of thinking is important. Human brains are slow to process negatives (that's why the questions on tests with the word NOT in them are usually the trickiest). Keeping it simple and assuming compliance helps too.

We walk in the house
we jump outside
we keep our space clean
we treat each other with respect
we use kind words with each other even when we disagree

That help?
If you get stuck on turning any around into positives put them up. My son has autism so all rules must be in the positive or I am left beating my head into the wall.