Water saving shower heads have historically provided a far less comfortable shower than high flow shower heads. New technology has vastly improved the experience and in some cases present negligible differences.
Hot water diverters
Every time you run the hot water you’re pouring drinking quality water down the drain whilst you wait for the hot water to come through. A hot water diverter can redirect this water to rain water tanks, grey water systems, your garden or in some cases back into the mains system.
Redwater - http://www.redwater.net.au/
Soft flow taps or Aerators
In kitchen and bathroom sinks the flow and pressure of water is often more important than the volume. By mixing air in with the water you can reduce the volume of water without compromise.