the largest impact you can make would be to simply become a vegetarian yourself.
You can also make a big impact by donating to animal-welfare causes like Vegan Outreach. In fact, if you think the numbers in this piece are within an order of magnitude of correct, then you could prevent the 3 or 4 life-years of animal suffering that your meat-eating would cause this year by donating at most $15 to Vegan Outreach. For many people, it's probably a lot easier to offset their personal contribution to animal suffering by donating than by going vegetarian.
Of course, the idea of "offsetting your personal contribution" is a very non-utilitarian one, because if it's good to donate at all, then you should have been doing that already and should almost certainly do so at an amount higher than $15. But from the perspective of behavior hacks that motivate people in the real world, this may not be a bad strategy.
By the way, Vegan Outreach -- despite the organization's name -- is a big advocate of the "flexitarian" approach. One of their booklets is called, "Even if You Like Meat."
One of their booklets is called, "Even if You Like Meat."
I wish they would make editions available without the horrible pictures; I'm already aware conditions are bad, and I neither want the pictures to hijack my decision making process while reading, nor to experience the neg-utils from seeing them.
I have noticed that among philosophers, vegetarianism of one form or another is quite common. In fact, I became a vegetarian (technically a pescetarian) myself partly out of respect for an undergraduate philosophy professor. I am interested in finding out if there is a similar disproportion in the Less Wrong community.
I didn't request that this go into Yvain's survey because I want more information than just what animal products you do or don't eat; I'd also like to see nuances of the reasons behind your diet. There are a lot more shades than carnivore/vegetarian/vegan - if you want to be a vegetarian but are allergic to soy and gluten, that's a compelling reason to diversify protein sources, for instance. I'd also like to hear about if you avoid any plant foods (if you think they're farmed in a way that's environmentally destructive or that hurts people or if you have warm fuzzy feelings for plants, maybe). Here are some questions that come to mind: