An excellent resource for everything related to water use efficiency is EPA's WaterSense Program. Besides valuable information on how to save water at home or at work, you can search for water-efficient products that save water without compromising performance.
EPA's WaterSense Outdoors has a wealth of information on everything from designing water-efficient landscapes to finding certified irrigation professionals in the greater metro area who can help you design, install and maintain water-smart landscapes.
Colorado WaterWise connects stakeholders, provides resources and serve as a collaborative leader in the efficient use of urban water in Colorado. Their Live Like You Love It page has some "Fourteeners" hints to help you save water. Check out their resources tab for links to water conservation programs throughout the state and beyond.
Calculating Your Water & Energy Use
Curious to find out where your household uses water the most and what your annual carbon footprint is per year? Try the Alliance for Water Efficiency's Home Water Works Calculator. The Calculator provides a nice overview of your results. The data are presented by family size, landscape size and zip code, to give you a better idea how your water use compares with similar households. Your carbon footprint – for heating water – is part of the results page, too. They even give you recommendations and resources for how to save more water and energy.