I was in my 40s before I learned that "washing your face in the shower" is so much easier if you exhale slowly through your nose and mouth while rinsing. It's also a really good idea when you're tipping your head back to wash your hair, to plant one of your feet at the edge of the tub or shower. This gives your brain a better reference to what "up" and "down" are when you've got your head tipped back and eyes closed under water that's spraying on you at an angle. This didn't matter so much when I was younger, but now that I am old, it's pretty much a necessity. Falling in the shower is incredibly dangerous.