Here is an article in the New York Times that lists five steps families (especially those with children) can take towards going organic. Since I think many of us have given up the idea of large numbers of people making significant, big changes that are better for the planet, the best we can hope for is a lot of people making a lot of small changes. This will at least somewhat lessen and slow the damage – to ourselves and the planet – where possible. And articles like this are a great place to start.
I must say that the first suggestion in the article about milk seems important if you drink milk, but having switched to soy milk a few years ago (it does take some getting used to) you also might want to think about that. You can avoid the pesticides and hormones that way too, and its healthier for you and happier for cows. They have made great strides in soy milk (and they now have soy creamer which looks white just like milk which, for some reason I really like).
For other postings on the environment, you can see my post “I could keep living generally the way I wanted” which actually sort of contradicts my somewhat new-found resignation to incrementalism, reflected above. There was also a recent post on environmental legislation vs. personal conservation over at Looking for Faith. You can also read about how our clothes choices and food choices impact the environment here and here.
Happy planet saving!