For those sentient beings who have figured out that the maintenance of a high energy, wasteful, super-consumptive lifestyle is, well, unsustainable, or who merely wish to cushion themselves from the inevitable and enormous increases of basic necessities (like food and water, for example) here are some interesting items to get started.
Water: an extensive review of rainwater harvesting in Chaos' most unfortunate home state (warning: pdf file)
Food: Carolyn Baker interviews a couple of small organic farmers in Vermont, including why they chose this lifestyle, benefits, etc.
For further reading: Better Off: Flipping the Switch on Technology, Eric Brende. Chaos, having purchased this book recently at a used bookstore, can highly recommend it.
Let it not be said that doomerism is, necessarily, depressing...