Ways to encourage water conservation

What are some ways to encourage water conservation?

Municipal utilities are implementing metered water systems to encourage conservation. For someone who lives in a rainforest climate where water is plentiful and is used to water as a free resource this seem unnecessarily punitive.

I agree that we should all be mindful of our water consumption.

I would be interested in learning about some other ways of doing this - ie - a tap or shower head that provides an indicator of the amount of water used per session.