VMware has published some demo videos on how to develop vCenter Orchestrator (vCO) workflows. The first time I ever worked with vCO before I actually were clueless on what to do with it. In case you feel the same way right now these three youtube videos might give you a good start.
Developing Your First VMware vCO Workflow (part 1)
Developing Your First VMware vCO Workflow (part 2)
Developing Your First VMware vCO Workflow (part 3)
And if you are interested in more demos from VMware check out VMwareTV on youtube
TXUSA 