It's simple: label everything.  Where things go.  What things are called.  Which direction to turn wheels and knobs.  Does the lever get pulled up or down?  Label it.

I often simply use yellow duct tape or electrical tape and a black magic marker to make a temporary label during an action workshop.  It's true...this can look kind of tacky.  But it gives the operators a chance to "live with" the new labels for awhile before committing to something more permanent.  The idea is to get from "temporary and tacky" to permanent as quickly as possible.

In my experience, labeling goes a long way toward helping the organization Sustain the 5S gains.  Labeling allows just about anyone to walk through an area and tell if 5S policies are being adhered to or not. 

At one client, they've provided die carts for each work station.  The die carts are labeled with what's supposed to be on them.  Now, I don't know anything about the tools they need but, because of the labels, I can tell whether the die carts are in order or not.  Does the labeling guarantee that the die carts are always in order?  In a word...no.  But it allows me, or the supervisor, or the plant manager, or...whoever, to see that a specific tool is missing and to point it out to the operator before he or she needs it.  I can tell right away if Joe is missing his tin snips or not.  If he is, I can (and do) tell him to round them up before the next die change.