I do my best, I wont drive around unneededly, and I try to avoid using stuff like plastic bags or other stuff that generates lot of trash, especially plastic trash. If I put something in a zip lock or something I try to reuse the bag and if it's not dirty I'll recycle it. Plastic is the worse as it takes 100's of years to decompose.
I also try to use electricity more than gas. In winter I'll run a small space heater if I'm cold instead of warming up the whole house. Though at same time I'm not willing to go all electric since it costs way too much.
Eventually I'd like to go wind or solar for power, and at that point I'd probably look at heating with electricity and just use gas for when I'm low on battery power. Our electricity comes from hydro electric dams though so it's fairly green. Not sure if it would be considered renewable (those streams will run out eventually) but probably the next best thing. Way better than spewing out tons of CO and CO2 into the atmosphere.
I would actually love an electric car, though I just can't justify the cost of a new car, when I can get a used car for 5k. So until there are enough electric cars for a used market to build up I probably wont get one.