Ezra links to an interview with Paul Roberts (whose End Of Oil I found incredibly eye-opening and despite its title not at all Peak Oil/end-is-nigh-ish) on his newest book, The End Of Food, about the increasing energy costs of food production.
One of his commenters points out early on that the per-calorie energy costs of meat and other animal products dwarf those of long-distance shipping of vegetables. That got me thinking that it would be nice if there were an easy way to cut down on the animal products you consume without necessarily going whole hog, cold turkey.
For example, the milk in my coffee every morning: if I have to choose between continuing my present dairy consumption and switching entirely to soy, I'll probably stick with the status quo. But the same way in some parts of the country you can fuel your car with different mixtures of gasoline and ethanol, you should be able to buy milk that is some combination of cow and soy. That way you could sort of ease into a more responsible diet instead of having to make a single drastic change from which you may be more likely to relapse.