We are getting the outside of our house painted, so when I go out for my walks, I see a lot of strange stuff piled up on our patio, which inspired this Meezer Rule:
You must always investigate and approve any new item that comes into your territory. This is very important, and it will maintain your rule over the household. If you do not approve, you have two choices of action to take on the offending item, 1) chew on it, 2) Pee on it. I typically prefer number 1, but the boys typically go for number 2.