Personally, I have come to the conclusion that the simplest and most effective "green" action everyone can take is to switch to a Whole Foods Plant-Based diet. Teh #WFPB nutritional paradigm is a low-entropy lifestyle. I maintain a blog on vegan shopping for my neighborhood. Overall, the economic cost of nutrition based on animal protein is simply staggering, as can be seen in this infographic from Inhabitat, and even more so when combined with the fact that 75% of health care spending in the USA is for the treatment of degenerative ilness that is directly attributable to SAD (Standard American Diet), as is explored in a recent documentary, What the Health.
Also, Water and Energy go hand in hand, and both are an integral part of sustainable development.
Apart from the aspect of conservation, there is the issue of sustainable water use, and... there is always the issue of water quality. Besides unintended contaminants, there are such issues as lead in pipes, chlorination, and fluoridation, and overall water quality. The key to healthy drinking water is to take out the bad, and leave in the good (minerals/electrolytes), and beyond that to have a Relative Hydrogen Score (rH) below 28. Here are the tools to do it:
Some solutions I have found:
Energy Procurement, Planning, and Renewable Retrofits
Planning, Analysis, Economics, Negotiation, Management