I shop at a couple of ethnic markets, and I find much better prices on produce and meat (barring manager mark-downs) there.
I, too, think grocery prices have gone up. As well as my little eaters are growing, and they eat more. i used to be able to spend $30 at my (local, a bit hoity toity) farmers' market and have enough produce for the week. Now, that's not enough for us. A CSA provides about the same amount of food around here (they aren't huge quantities), so it wouldn't save us any money. I do much better at the international markets. One week this summer, our local farmers' market wanted $1 per EAR for corn. Yeah, I can't afford that.
I shop at a couple of different stores (I'm in suburbia, so I just keep a list, and if I'm near a store, I'll pop in for their loss leaders/specials/consistently cheap items). There are a couple of local blogs to me that follow the fliers and coupons, so I can tell what is a good deal/free. That helps, too, because I don't have to spend much time on it. I get the newspaper anyway (it's one of my favorite splurges), so I don't have to go searching for coupons or anything. I have started concentrating my coupons on more non-food items, to cut that part of my budget. Things like laundry detergent, dishwashing soap, toilet paper, shampoo, etc. We use Suave shampoo, but getting it for $0.25 is better than buying if for $1.50, you know?
But, really, the major way that this is helpful is that I live in a place with lots of grocery deals (Publix has really good sales), everyone doubles coupons, and those blogs make it really, really easy. If I lived somewhere else, I'd have to come up with different ideas.