If you are planning to remodel your bathroom this Consumer Reports article give sound advice on how to do it with safety in mind.  Install pressure-balancing and anti-scald valves to provide a steady flow of water that remains at a safe temperature.  Add a sturdy, properly secured grab bar that will support 250 pounds.

Since mold and mildew thrive in a moist environment, ensure your vent fan exhausts to the outside and run it after every shower to dehumidify the room.  Remove any items (hamper, scale) that might cause a tripping hazard and ensure mats have non-skid backing.  To read more click here.