TIP: Only Add Activities You Actually Use
However, if you discover that you have many jobs with activities that never get scheduled or completed, that's a sign that you don't need that job activity on your typical job template.
For example, out of the box, JobTracker comes with Template, Fabrication, and Install activities on the Standard Job template:
To remove Fabrication, simply edit the Standard Job template, click Select on Activity Types and uncheck Fabrication:
This will prevent you from having to cleanup old activities later - and will help make sure job activities don't fall through the cracks.