I can't do anything about how far I drive to work, but I have saved almost 20% in fuel cost by driving the speed limit lately--they really won't run over you as long as you stay out of the two left lanes on the interstate. My car already would get 30 mpg, now I usually get 36.
I don't use any artificial chemicals on my flowers or vegetables, and no bug killers outdoors at all. (I do spray inside the house and treat for termites once a year, but you pretty much have to in this climate.)
I don't use a lot of household chemicals.
I buy very few processed foods at all.
I'm gradually going to the squiggle light bulbs. Actually about the only time i turn any lights on in the house anyway, is in the wee hours when I come home, or in the kitchen to cook. My house is tiny so I get plenty of light most of the time that I'm actually here.
The size of my house, and the fact that it's got a lot of extra insulation mean I can keep my AC on without the unit (which is an new, efficient one anyway) running all the time. Sorry My Northern friends, AC is a must here if you have no shade!
The hearter is a heat pump, also very efficient, and I don't turn the heat over about 65 anyway.
I don't eat much meat of any kind, and probably 85% of what I do use is fish caught by me or non endangered game animals, not farmed.
I have no children.