Ifs

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 it it call in 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 belongs to someone else, get permission to use it.

If you don't know how to operate it leave it alone.

If it's none of your business don't ask questions.