In addition to sloughing away dead skin from your body, use a pair of exfoliating bath gloves to clean your bathtub and shower. After your shower, while the shower and tub are still wet, put on gloves and rub your hands over shower and tub surfaces. You'll be able to feel where soap scum has built up and just scrub it away. Use a gentle cleanser to to do this...or don't. The choice is yours. Wash the gloves with bath soap or shampoo, rinse well, then hang gloves to dry when you're done.
I don't know where I read about this tip, but it's one of the best tips I've found lately. Use a separate pair of exfoliating gloves in the kitchen to clean veggies. They are especially good for cleaning potatoes. When you're finished, just wash them with dish soap and rinse well, then hang them to dry.
These gloves are only $1 a pair at stores like Dollar Tree and Deals.