It may be in your best long term interest to replace your current toilets and showerheads with lower flow models for maximum water conservation.
Low-flow showerheads and faucet aerators are relatively inexpensive and efficient.
Lower showerheads - when a showerhead is fitted high above a shower, a lot of water is wasted as the water is sprayed a greater distance.
Ceiling-mounted shower fixtures, remote-controlled fixed showerheads, body jets and hand-held sprays are just some of the fancy options out there.
Occasionally other things can go wrong with showerheads and cause leaks, but these are by far the most common culprits.