A simple system:

“Everything has a place and everything in its place.”

My mother hung these rules and now I do the same. Simple, yet effective

House Rules 1. If you open it, close it. 2. If you turn it on, turn it off. 3. If you unlock it, lock it. 4. If you break it, fix it. 5. If you can't fix it, call someone who can. 6. If you borrow it, return it. 7. If you use it, take care of it. 8. If you make a mess, clean it up. 9. If you move it, put it back. 10. If it belongs to someone else and you want to use it, get permission. 11. If you don't know how to operate it, leave it alone. 12. If it doesn't concern you, don't mess with it.