Water

Have a shower
Take a shower instead of a bath and you will use much less water.  

Turn taps off
Remember to turn taps off properly and repair ones that drip to save water.

Filling your kettle
When filling up the kettle heat only the amount of water you really need. It'll save a load of energy.

Collect rainwater
You can collect the rainwater that fall on your rooftops in water butts to water your garden.  You can also make use of greywater in the garden.  Any water that has been used in the home, except water from toilets, is called greywater. Shower, sink and laundry water can be re-used in the garden during droughts.  Greywater should not be used to water edible plants.