It all depends on your strategy from what I can tell. Do you want the fast flip or are you planning on holding onto the name?
The ones I've sold were just set in the GoDaddy marketplace, but it never hurts to list your domain names in marketplaces to expand your reach. And if the domain name is a geo or you can find other businesses that may want to upgrade their domain name, outbound may do the trick as well.
I do suggest to dig deeper into the forums though to educate yourself on how you may want to do things. From what I've gathered since I found this place, there are different methods to the madness. There's a wealth of knowledge.