I don't know that I'm a 'pristine eater', but I have spent several years focusing on a healthy diet. The first thing my husband and I did was start trying to grow the vast majority of our food ourselves. We have extensive vegetable gardens, and I store lots of veggies via canning, a root cellar and freezing. I tend to cook what we have - so we may not be eating fresh lettuce in January, but I grow sprouts all winter and mixed with stored cabbage, carrots, onions and so on, it makes a great winter salad. For fruit, we have raspberries and blueberries (frozen in winter), and apples (dehydrated in winter). We raise shiitake mushrooms and garlic to sell (and eat, of course.) Also apple butter, jams, etc that I make. Lots of pickles. We have enjoyed kimchi and saurkraut as well. We end up with quite a lot of variety through the year, though right about now we are really looking forward to planting some fresh veggies! And the asparagus, ramps and fiddleheads starting to grow soon!
We do eat meat, but all of it is raised by us or by people we know locally. We raise chickens, some of which we trade with a friend for turkey and rabbit that she raises. We get beef from a local dairy farmer who sells the boy cows as meat. Pork is a problem, as our friend who used to raise them is no longer doing so. Looking for a new source and in the meantime just getting an occasional pound of bacon at the farmer's market. Also, almost all of the meat we eat is cooked with lots of veggies in a casserole.
We buy fresh raw milk, from which I make yogurt, soft cheese, and ice cream. I make a delicious and healthy raspberry ice cream with just 4 ingredients - milk/cream, raspberries, local maple syrup and bits of dark chocolate. Mmmm. I actually replace sugar with maple syrup in most recipes.
Our main challenges in terms of local food are rice, pasta, chocolate and coffee. We don't eat tons of these, and purchase organic stuff at our local coop, but definitely are not able to produce them for ourselves!
I think that reading Barbara Kingsolver's book, Animal, Vegetable, Miracle had a huge impact on us and our diet. Basically, that was the inspiration that started us on this journey several years ago. Each year, we get a little further down the road of finding new ways to cook and store our food. And I really can't imagine eating mainstream any more. The quality of food is just so much better if you make it yourself!