What are some ways to bring sustainable living into a typical suburban lifestyle?

I’ve read that a vegetarian diet is better for the environment than a diet that includes meat. The reasoning is that it takes a lot of land to grow feed for animals for meat. It takes less land to grow an equivalent amount of vegetables for direct consumption by humans. That seems to make sense, but now I’m having trouble to find statistics to back it up. If anyone could point me in the right direction, that would be super awesome.

Eating more vegetables and less meat is easy, but other things are a bit harder. I live in a neighborhood with no access to public transit and, for much of the commute, no freaking sidewalks. I would love to bike around instead of driving, but have you tried biking on the road next to all the cars? It’s terrifying. It’s around five miles just to the nearest grocery store, again, with no sidewalks most of the way. I’m thinking of gardening. My available space is a 10×10 deck, so anything that grows well in a compact space would be awesome.

I’m just looking for a few ways to alter my habits and be more resourceful and less wasteful.