Don't forget to cut make your liriope and spireas. Also certain varieties of hydrangeas need to be pruned back as well. Pee Gee, Tardiva, Limelight, etc. need to be pruned back each winter to about half their original size. The old fashion mop tops require no pruning unless they are getting to large for their area. But you will want to cut out the weak and dead stems from the interior of these plants. This will help with air flow thus preventing diseases and will add in new growth. With new growth comes more flowers.
Don't forget to also re-bark your flower beds. I prefer hardwood mulch. Mulch will add nutrients to the soil as it decays, conserves moisture, prevents weeds, and looks great and fresh.