The infamous Golden Rule: “Do unto others as you expect them to do unto you.”
the practical way in applying it — If you open it, close it. If you turn it on, turn it off. If you unlock it, lock it. If you break it, repair it. If you can’t fix it, get someone who can. If you borrow it, return it. If you use it, take care of it. If you make a mess, clean it up. It you move it, out it back. If you want to use something, get permission. If you don’t know how to operate it, leave it alone. If it does not concern you, don’t butt in.
And
If you have no luck trying to operate something, and you’ve tried everything else, try reading the directions that came with it.
Ayos! 
