I always buy organic animal products, dairy and eggs (pesticides, hormones, dioxins etc are stored in animal fat) and thin skinned fruits like berries that can't be peeled (if they're in season/affordable).
When I'm on a tight budget I buy 'commercially grown' peelable produce (like carrots, potatoes, other root veggies, apples etc) to minimize pesticide consumption.
If you make your own bread, it really isn't 'that' expensive per loaf to buy organic wheats/grains, though I often don't if I'm short on cash. I still think it's cheaper than paying $3.50/loaf for organic bread (which we go through quickly).
I don't have any money saving tips other than to buy in bulk and freeze if you have space. My grocery bills are always outrageously high. We don't buy much snacky food (well, part of that is me trying to avoid hydrogenated oils but that's a different story) so dh and ds get peanut butter sandwiches, fruit, etc for snacks unless I was ambitious enough to make cookies, which rarely happens :LOL