Lyme diet- grocery costs

I know a lot of folks have a diet that is special/restricted - paleo, low-sugar, etc. and grocery bills can be high buying organic, non GMO, etc. I'm always looking for creative ways to cut costs on food and try to use coupons, compare prices, etc.

Anyway, I may be totally late to the game, but I just recently heard of ThriveGives by Thrive Market.
I'm not associated with Thrive Market and my apologies if this sounds like an advert. I just used to use Thrive Market, but stopped my subscription to cut costs, and was glad to hear that now they're waiving yearly membership fees for low income families, students, teachers, veterans that apply & qualify. It's a bummer- no fresh produce, etc. but they do have staples like almond butter (plus clean beauty products, some supplements, etc.).

Just thought I'd share and would love to know of any other similar websites and grocery cost-cutting tips. What do you do get healthy food at lower prices (ex. shop at Costco, get a weekly CSA box, shop at the farmers market)?
Maybe it seems funny to talk about groceries, but hey, every little bit saved helps, right? More money for other food, herbs, meds, and so on.

Last year my garden was a deer magnet. Not this year. I'm not going to bother. Veggies make me puke anyway.

And the ground hogs ate my gourds and pumpkins.

I use rebate apps (iBotta, checkout 51, mobisave, etc). Most of their stuff is junk, but once in a while there's good food on there, or produce rebates.
Also the website commonkindness.com has coupons for health food, and you can use it to donate to a favorite charity/local school.
Some grocery store apps, in connection with your club card, will track your habits and give you discounts on the good things you buy.
I found a local farmer to buy pastured meat from. Expensive, but nutritious. Most of their food isn't more than the "organic" stuff in the store.
I hit up discount grocers and find a LOT of healthfood gems there (for the munchies in between the home cooked meals; and ingredients.)
ALDI has an increasingly nutritious and organic selection.
Foreign food stores are sometimes really great if you live in a melting pot area. European food has stricter regulations and has less sugar and preservatives in general than American junk. And Asian stores are good for rice and coconut-based food.
And if you live near a border - state or country- sometimes you can hop over to a cheaper area. I live near D.C.- atrocious prices! but do my shopping in PA when I visit.

Thanks for sharing your grocery saving tips, everyone. Great ideas from homegrown gardening, freezing on-sale meat, to apps/ sites (commonkindness.com sounds awesome!), to farm boxes!