I'm extremely frugal and find that one of our largest expenses, as a family, are groceries. I cook often, have three mouths to feed, and use the highest quality ingredients I can (after assessing the cost/benefit ratio, of course). One of the ways I save money is by participating in a local farm share.
Yes, it means you may get unusual vegetables and have to be creative in your recipes (a challenge I enjoy). Yes, you have no control over what you get and how much of it. But the overall value is great. Not only is the produce awesome (often organic or as close to organic as it gets), but I get a TON each week. It supports local farms and the food kitchen that it operates out of. Also, one of the employees cooks something each week for farmshare members to try (using some of the ingredients). This week was caesar salad with the collard greens.
Not to mention, it is an AMAZING deal. Seriously. I pay $15 (yes, only $15) and get well over $30-40 of high quality produce each week. If you are local to NYC, check out Corbin Hill Food Project and sign up. You could even go in with a friend/family and share the bounty and the cost. This is one way I save a ton each month on grocery costs :)
Again, for $15, this week, I took home:
2 bunches of organic kale
2 bunches of collard greens
3 green tomatoes
12 apples (of which some are honeycrisp)
3 huuuuuge sweet potatoes
I also got a great free bag too.