Being conscious of your output is important. I'm not saying get rid of your car, never use a chemical again, don't eat red meat. I'm saying sacrifice where you know it won't bother you too much. There are certain places in my house that need a heavier cleaning job and so I have certain cleaners in my home for those areas. Also, I have never been, nor will I ever be, a vegetarian. I love red meat, but the cattle industry is pretty bad when it comes to greenhouse gases.
So, if you cut down your red meat consumption to once a week it will not only help your health (big plus!) but it will be an environmentally friendly way to live.
The hard part of living in an environmentally friendly way is the frustration. Firstly, one constant suggestion in the media is to buy your produce at farmers markets. That's all well and good but if you live in the northern half of the country we don't always have that option. Then we end up at the grocery store, buying produce from halfway around the world which isn't good, but do we really want to deal with no fruits and veggies all winter long? I think not. Also, if you're down to read meat once a week that means you need to get your protein elsewhere (and if you're not into tofu I'm right there with you) so that means chicken or fish. Fish can be a problem because certain types of fish are being severely over-fished. Here's a list of the good, bad, and the ugly in the fished population. So being environmentally concious can be a pain, but knowing is half the battle. Just being aware of how your dietary choices, and your daily household choices can affect your imprint on the environment! I don't believe that environmentally friendly living should rule your life, but it should definitely be a part of it.