I have a network of experts in various fields that I've developed over the years I've worked online. There are some who are really good at working cooperatively and others who are not. As I work to deadlines I really need people who are available and so often especially with web designers and graphic people they are not readily available when I need them. so, I have a number of them I can refer work to. I do the content and get them to do the design.
Also I do a lot of customer service for creative people, designers etc. I handle their client correspondence and any complaints. so we help each other. Some is barter and some we pay each other just depends on the relationship.

Works well for me.