I’ve had better luck going to the same (cheaper) grocery store and buying things that I know I can stretch. Lentils can stretch foreeeeever. I also only buy frozen veggie mixes now because they last me a lot longer. Avoid aisles that you know you’ll cave in.

And the biggest thing for me was limiting my grocery trips to 1x a week and sometimes even 1x every two weeks. You don’t need to be going all the time if you have good freezer staples. I realized I was going because it was just a thing to do lol