Re: Has anyone else done this yet???
I'll jump in here before this thread falls off the conveyor:
1. Before stripping the Romex sheath you circumscribe about an inch of the sheath with your knife (you score the sheath around its circumferance).
2. You pop off that little tube of sheath and flatten it out so you can write on it.
3. You strip the sheath back to the connector in the panel and dispose of it. Or, you may have another method of getting the sheath off the cable assembly. Whatever, just strip like you normally would to expose the conductors back to the Romex connector.
4. You get out your Sharpie pen (fine-point) and write the name of the circuit on the little sheath tube you created. This becomes a wire marker (label).
5. You slide that custom label back onto the conductor(s).
6. You land your conductors as needed.
You now have a neat little permanent label on the cable assembly where it enters the panel.
If this word picture does not work, let me know and I'll snap a digital photo of one when I get a chance.
Of course there are other labeling protocols, but this is a low-cost and easy one that really works.