Yay! 
and stuff 
Yay! 
and stuff 
What am I doing to make the world a better place?
I work in environmental remediation/consulting. Where I am working now, I deal with gas stations doing ground water monitoring to keep an “eye” on gasoline components in that may have or already have leaked shallow groundwater. This summer I did a big project dealing with soil sampling to find out where the leaks were coming from.

My four-cheese garlic & oregano mashed potatoes that I made today certainly make the world a more pleasant place to live.
I guess I should add fundraising/housebuilding for Habitat for Humanity and my wife’s and my involvement with Community Action and the local food bank. We also donate to educational causes when we can.
I beat up people who email me stories from Chicken Soup for the Soul.
32 years as a volunteer firefighter. Cat person for injured and homeless kitties. Offeror of stern glares to mindless souls who play thumpa-thumpa sounds from rice rockets with farting raccoon mufflers. 
I edit and administrate Wikipedia.
I make regular contributions to the Wikimedia Foundation, the Peer Directed Projects Center, and the ACLU.
I write free software (when I can find the time).
I use mass transit when I can.
I don’t shop at Wal-Mart.
I vote.
Ok…
I don’t own a car. Haven’t for years. Does that count?
I just joined the volunteer fire department here, and I may have helped cure myocardial infarctions.
Not a penny of mine ever goes to a charity. Why?
i work for a not-for-profit. We are trying to discover the causes of prematurity and birth defects.
I forward Snopes links to people, and teach them to check their facts.
I’m not having kids in an already crowded world.
I’m nice to people.
Heck yes, it does. That’s my contribution - I don’t have a car out here. I ride my bike or take the bus to get everywhere. Occasionally I get rides in other peoples’ cars, but I never drive by myself. Out where I’m originally from, driving is all but impossible to avoid, so I’m hoping not to move back any time soon.
I also work at an after-school program for the middle school in a nearby city. And I don’t shop at Walmart. On the other hand, I have been known to shop at Target. Hmm. Hey, I’m doing what I can.
I volunteer for a charity which provides contacts and information to people with a very obscure disease. Since the disease can kill if not properly treated, I help save lives.
I recycle – everything. Looking at everything I have to put in the regular trash makes me a better consumer, as I choose to buy items that have less packaging.
I have never owned a car.
I check the companies that get my money to see how they spend theirs – where they donate, how they treat their suppliers, how they treat their employees. When I choose to avoid a company, I tell them why.
I give blood.
Ooh, you beat me to it!
Other things I can add:
I commute by way of mass transit.
I recycle.
I’ve adopted several cats from shelters, and had all of them spayed/neutered.
I do my best to exercise patience and consideration with others, especially with cashiers & waitstaff who might be having a stressful day.
Sometimes I smile at everyone I see, for no reason at all.