That's how I do it. If the hot circuit is black, I'd use red or blue for the switched circuit.
Just as good practice, I always run the half hot from a seperate circuit, but on the same phase whenever possible. This way, you aren't putting 240V in reach of a curious kid with a paperclip.
If you can, run an additional neutral, so the outlet is completely split, especially in commercial. It's just good practice, in that commercial demands are usually enough to overload a single (#12) neutral on 2X 20A circuits.
I'd also use 20A devices, including the switch.
=)
