I just found something interesting on the Internets, about saving the environment... by not buying new stuff every week or something. For example, keep that phone you already have. Hang on to that camera that still works. I like this initiative, and while it's so darn obvious, I choose to do I so I don't have to be bothered to go out and buy something. Check it out here.
Anyway, discuss how you guys attempt (or not) to save the environment.

I run heating (inc water) on solar power, excess goes into the grid. And I rarely buy stuff, instead holding out until it becomes necessary, in the last 5 years it's been new car tyres and a new PC, I need to replace work clothes soon. Food and digital entertainment (gog/steam/internets) the exceptions.
On topic side track -
Robert Llewellyn (Kryten of Red Dwarf fame) back in 2008 (2007?) made an aim of not buying anything *new* for an entire year. He's currently writing (or was contracted) a book about it "Making Do" working title.

Whenever I buy something new, I usually pass my older model down to my younger siblings. Since I upgrade all my stuff, they always appreciate and take care of what they get, so nothing goes to waste.

I... don't cause MANY nuclear disasters.
I usually do the handmedown tech thing when I upgrade, buy stuff thats not belching coal smoke and the like.
If & when I get a licence and the money for a car, I was planning to buy a hybrid but thats more for reducing fuel costs than environmental concerns

Until recently, I was too poor to buy new things, so I suppose that might count?
I also live close to where I work, so I walk almost everywhere, or take public transport.
I'm not really that good at saving the planet though, but I tend to think along the lines of James Lovelock.

A lot of these things we've been doing for some time, so we don't really consciously think about it anymore:
Reuse: anything we're finished with, we try to find a different use for. If we don't want it., we offer it to neighbors or friends to see if they can use it. If that doesn't pan out, we either put it on the front lawn with a 'Free' sign on it (if it's furniture or something of that nature), or donate it to a charity (old clothing, books, etc.). If it's just plain worn out and not usable by anyone, we try to recycle as much of it as possible.
Reduce: we try not to go too heavy on the "Ah, just buy another one" or "Buy extras" mentality. We also try to reduce the amounts of various things we use on a regular basis. For shopping purposes, we have reusable cloth grocery bags as well as plastic grocery bins to reduce the amount of plastic and paper bags we get.
Recycle: our city has a pretty decent recycle program, so all glass, paper, cardboard, plastic (even plastic grocery bags), etc. is recycled. We recycle everything we can.
We're also setting up a compost in our back yard, so that will significantly reduce the amount of waste that goes into the garbage can. When our lightbulbs burn out we replace them with CFBs (although I know there's a concern with them as well).
Any hazardous materials (paint, chemicals, or computer/electronics components that don't get reused) we take to the local disposal site to get rid of them properly.
On a side note re cars: we've been driving the same van for 10 years. That all sound well and good, but the key here is maintenance. If you don't keep your vehicle(s) maintained, driving an old one can be more harmful to the environment than getting a new one (in fact, the current technology makes many new vehicles a better option environmentally than driving an old one).
*editt* Oh, I should point out that this isn't all motivated my an altruistic concern for the environment or some hippie agenda. This is mostly motivated by money. Although being good for the environment is part of the motivation, doing what we do saves us money.

I steal everything I need so I save money and recycle all in one. I do admit to pouring bleach down the grid with pure abandon but that is in an effort to kill as many bacteria as I can find so that there is enough air for me and my herd of pet cows who give off enough methane to cause a major fire hazard but, hey, I am doing my bit.
I am also looking to recycling my wife and getting a new one. I decided to compost her remains just as long as I can find a compost heap large enough. She was a big lass.

I dont wear fur (or any clothes at all, but that's beside the point).
I don't drive (my driver does, but the jerk couldn't care less for the environment, so it's ok)
I don't drink bottled water (or any water, beer it's just fine)
I'm active about solving the toxic waste problem (if any of you have any toxic waste laying around, just give me a call, and i'll take care of it. Small fee required)
I'm active about the global warming problem (i have a 'crew' stealing blankets from homeless people)
I recycle (well, i wash the blankets before selling them. That count's as recycling, right ?)
I do contribute in many other ways, but i'm to modest to talk about it (and i would probably get in serious trouble if i did)

I do not procreate. (I do have sex)
This has such a ginormous benefit for the environment that I never have to feel guilty when I flush the batteries down the toilet, or buy food and when I come home immediately throw it away, or leave the central heating on in the winter at 25 degrees when I went on holidays for a couple of months, so when I came back it was nice and warm, or even have to worry about driving my 3000 ton coal powered steam locomotive to buy ice creams 2 times a just down the road of where I live.
Seriously though, the impact of one extra human being on this earth is so great (especially in a western society).
If you were to compare that impact to the environment to loads of things like recycling,saving water, living in a cardboard box or whatever, you'll find that it doesn't help a lot.
Also, I'm not obese.
And I don't have a car.
So my CO2 reduction is through the roof.

LOL. I think I may have a compost heap that will do the trick...

Look for groups like www.freecycle.org in your area. Someone's trash is another's treasure.
If you can find time volunteer some time by cleaning up a local area you care about. It's not much, but I tend to find once you start others pick up the habit :).
Buy second hand - it's getting increasingly easy. I rarely by new books/clothes/movies these days.
Public transport/bicycling/walking/shared driving etc. also don't take loads of effort to sort out and can actually be quite fun.
[And sadly - and loads of people still don't - turn off your heating, your lights, your tv - unplug all those stand-by only devices when you don't need them. It'll mean you have more money for gog, too!]

I haven't upgraded my computer since I built it myself in 2006... apart from adding watercooling.

You might find a box being delivered in a few days. ;-)
I find freecycle to be pompous and confusing, instead of a seperate thread that's for one item it's a single page where the item you're involved with ends up four pages down in a matter of a day or so and you are forced to read all of the items inorder to find whether it's promised to anyone.
Daft system.

I usually do everything that is im my power to contribute to the warming of the earth . : )