Conserve rainwater

Something that saves money as well as water is worth looking into. Rainwater conservation is one of those somethings, as that stuff that falls from the sky can be used to flush toilets, water gardens, wash cars and fill water guns aimed at loathsome people. Rainwater catchment devices range from the somewhat simple (the most basic of rain diverter kits can sell for less than $10) to an Escher-like level of boggle (http://www.builditsolar.com/Projects/Water/Water.htm#RainWaterHarvestSystems). The more complicated systems are appropriate for installation only by the engineering-proficient or those who can hire the engineering-proficient. And if you're exceptionally lazy and/or cheap, you could always just stick a bucket outside and wet days and use the water in any way you please.


Effort involved: varies wildly.


Image from: http://www.flixya.com/photo/1963327/Funny-natural-car-wash-in-rain