I do notice you only have L/N hooked up to the mains. The earth ground next to the N lug should be wired into the mains earth as well. A grounded 14ga pigtail will ensure polarity cannot be reversed(unless house wiring is bad).
I have a few items that don't have power switches on them. I typically plug them into a switched GFCI strip, along with a desk light, that way I never forget to turn everything off. If the light is off, everything is off.