With capacitors, what I usually do is unplug and then hit the power button or the pedal a few times. The idea there is that any stored power will be used up trying to run. I've done this for years with computers and computer equipment. My router likes to be powered off fully for about 5 minutes before it applies new settings. (I will never buy another Netgear router!) I have that down to a couple of minutes reliably to apply settings properly.
I've done more damage to my nervous system by forgetting to unplug a cord (or unplugging the wrong end) before working on it than with anything with capacitors because of "good practices". :-/