If you open it, close it.

If you turn it on, turn if off

If you unlock it, lock it back.

If you don't know how to operate it, LEAVE IT ALONE.

If it belongs to somebody else and you want to use it, ASK.

If you borrow it, return it.

If you use it, take care of it.

If you break it, repair it.

If you move it, put it back.

If you make a mess, clean it up.

You get more bees with honey than you can with sour milk...

If you can't repair it, call someone  who can.

AND

If it doesn't concern you, mind your own business.