Restrict commercial use with a CC license with the NonCommercial condition, and then use a separate agreement with some party (could be yourself or third-party) to broker commercial rights (licensing, sales, reproduction, etc).
Require that adaptions are shared with a CC license with the ShareAlike condition, but offer a separate agreement (as above) for parties that do not want to release derivatives under the same license. Similar use cases for offering a private agreement for parties that wish to avoid fulfilling the Attribution or NoDerivatives properties of applicable CC licenses.
Offer a private agreement for parties that require one (eg for institutional policy or insurance reasons), even if their use would be within the scope of the public license grant.
To implement some type of Street Performer Protocol system to put works to the public domain or into another license, preferably more free and in the community interest.