I use the BarrelBlok for dry practice at home, as the act of installing it requires clearing the gun, and the act of uninstalling it is something I've internalized as 'loading' it, since I have a dedicated practice/training gun identical to my carry gun that is always kept empty outside of practice. It is an excellent visual reminder that the pistol has been rendered inert for the duration it is being used.
For myself, the act of loading the gun must always be accompanied by verbalization, as I picked up from one of Mr. Werner's books.
It helps me a lot to reinforce the idea that dry practice is a specific activity with a definite start and finish, just like with live practice, or a training class. Those also have their own ending procedures, along with their own negative consequences for continuing to draw a handgun and press the trigger. Failing to exercise this restraint in the past has made the difference between me staying hungry for the next session, versus disregarding whatever was just accomplished in the previous session due to feeling burned out.This gun is loaded. Dry practice is over.