What if you simply bought 1/2 as many gifts this year? Buy half as many gifts and see if you can find things that will last, things that are made really well. And for each gift you don't buy, write a card to that person and tell them how important they were to you this year. If you have kids (and it's hardest to cut down when it comes to your kids) try and get them one cool thing that relates to nature and the environment (books about tigers? Everyone loves books about tigers). If they are old enough, use that present to explain the links between our "stuff" and the natural world. If you are up for it, replace some presents for adults with gifts in their name to something like Heifer International. Rather than yet another Christmas sweater, they get to see that money go to buying chickens for a family that will then raise more chickens and, maybe, become self-sustaining.