I'm guessing the answer is you've gone vegan, but I gotta ask... eggs, milk, cheese and meat? how do you do get them without packaging?
I see the egg vendors at the farmers market filling cartons that people bring, then stacking the cartons they brought the eggs in, I presume to reuse.
My top strategy is to lose taste in such things, like everyone I know looks at cigarettes. People's diets are their business, but I used to eat a lot of those things and now find them not remotely like food.
It's alao cheaper to buy this way and quality of product on your table going to be much higher.