Tips:

replace hot water heater with hot water on-demand unit, which is instant, tankless and highly efficient

fix leaks

pour dehumidfier water into washing machine

replace your old toilets with dual flush/low flush models

replace your washing machine with a front loading model

put a brick, or two, in your toilet tanks: every time you flush, you'll save that volume of water

Links:

Ipswich River Watershed Association

H2ouse - water saver home