Don't forget that if you eat local, organic, and/or vegetarian, you'll be doing much less damage!
And that by exercising, you won't end up obese and/or in the hospital ;-P
My diet is probably fairly efficient, and pretty low wastage.  I do believe in the dry bluk trucked items though - rice, oatmeal, flour.  I think they are underestimated as low "fossil fuel" nutrition.  A frozen bag of chicken breasts is probably pretty efficient.  My medium level vice is frozen Trader Joe's convenience food (not the absurd things like frozen cooked rice!).  My major vice is coffee (thousands of miles, certainly).

I grow a few veggies in containers, but nothing major.

And roughly one meal out each day.

Please continue to buy organic (and local)!  We small farming operations, especially organic ones, rely on those who make the choice to buy organic.  While there is a premium price, there are also significantly higher costs of production (Actually, alot of our margin comes from the difference between the cost of trucking California to the Norhth East, not the organic premium.).

At any rate, what do you think will be the effect of higher gas prices on  shopping behavior?  Maybe people will say, 'I'd like to buy organic, but with so much money going to gas, I'll buy the factory farm stuff?'