out before you plug the tub is lost, which is a shame. instead, you should plug the bathtub before opening the taps and adjust the water temperature as it fills up.
also, you can catch the cold water first in a bucket and use it for another purpose such as scrubbing away the scum from the tub when you are finished bathing instead of letting it run down the drain.
you must also stop the habit of filling the tub to the brim when you want to have a soak. instead just let it fill up halfway, and you will save water in the bathroom.
there are shower heads in the market that 