Xeriscaping... and organic gardening practices...
at our house, we don't use pesticides at all. we choose plants that don't require watering (in theory)... we are spending a lot of time and effort undoing what the previous owners had done. we plan on tearing up half the front lawn this fall, and installing a watersaving landscape. it takes more planning, but its way more effiecient in the long run. who wants to spend all week watering the lawn so that they can turn around and mow it every weekend?
composting is one big thing you can do- uses up all your kitchen vegetable scraps, and it doesn't add to the enormous amount of trash picked up twice a week.
i'm not so sure about the man made pond. its an awful misuse of water, at least in the san antonio area. plus, its the ideal environment for the west nile virus to breed in mosquitos. i compromise with a bird bath. we are very water conscious people. we've installed a rain water collection system from our roof (also a giant mosquito/west nile breeding ground, but I drop these little organic discs in there- made mainly out of cedar, i think), and that cuts down on them a lot.
we've gone so far as to install a solar powered attic ventilation fan, and we use one of those reel/push mowers as well (creates less dust- great because i am allergic to grass, and when you move a lot, its a pain to deal with the gas mowers- the moving people aren't fond of them.. plus the noise is so much less).
its kind of hard- we only have 2 years here, and i have to learn as i go- this a completely different environment than i am used to. i figure by the time i get it all figured out, we'll be moving again. either that, or i never will
