If you open it, close it.
If you turn it on, turn it off.
If you unlock it, lock it up.
If you break it, admit it.
If you can't fix, call someone who can.
If you borrow it, return it.
If you value it, take care of it.
if you make a mess, clean it up.
If you move it, put it back.
If it belong to someone else and you want to use it, get a permission.
If you dont know how to operate it, leave it alone.
If it's none of your business, dont ask questions.
If ain't broke, dont fix it.
if it will brighten someone's day, say it.
If it will tranish someone's reputation. keep it to yourself.