Another one I’ve heard but don’t always have handy, maybe blogging it will help me. Or you? Poka-yoke

Poka-yoke (pronounced “POH-kah YOH-kay”) a method of preventing errors by putting limits on how an operation can be performed in order to force the correct completion of the operation.

E.g. the inability to remove a car key from the ignition switch of an automobile if the automatic transmission is not first put in the “Park” position

(edited from above Wikipedia link)