Outsourcing is never an easy task. I have outsourced writers from textbrokers, my connections and some gigs from fiverr. I know how hard it is. As a guy who just gets started with project management, I learned that you must anticipate the worst case scenario. Things will not go on your own way. And you must take that into account, and prepares some back-up solutions to it. I learned some lessons the hard way.
Here are some great resources on outsourcing that I think I need to return from time to time.