Hi Robert,
When you click on Edit for an object or field and you get to the Step where you can enter Actions, just click on the "Add Action" button. You will then be taken to a screen where you can choose an action, as you select different actions you will see a short description of what that action does.
We are working on a documentation that should be out in the near future. I'll keep you posted when it becomes available.
In the meanwhile, you can also take a look at our webinars that are available via our blog.