Saucha: Treat your body as a temple. Shower as necessary.
Ahimsa: Remember that no one likes to step into a cold puddle of water on the bathroom floor and it costs money to maintain the tiles when they become moldy.
Be compassionate to your fellow housemates, before entering the shower, secure a towel and place a mat on the floor. Dry yourself completely before exiting the shower. Hang up your towel for re-use, or deposit in the hamper.