When creating a new service type ensure that all the code for the service is placed in one project. (Note when I talk about projects this is for all Eclipse based development, i.e. IW 7.x and beyond).
For the processes that will be used to test the service place in a separate test project, but ensure that all processes start with the same unique prefix so that they are easy to find in the process navigator.
By separating the processes into a separate project when you change the process you will not have to restart the container as the classpath has not changed, this should save you time when you are developing and testing ESB applications.