I think the is one of the easiest personal ways to reduce consumption. I challenged myself and have recently completed 2 years of no "continuous" showers.

Instead, I sit in my empty bathtub and use the spray only for getting wet enough to soap up and rinsing off. In between, all my lathering and scrubbing is done with the spray off.

As a person who loves long hot showers, this initially took some getting used to, but now it is my daily routine.