With the above highlighted link, there are tips, which are easy and useful.
I often simply buy canned as opposed to frozen for convenience. I can fit more cans in the kitchen cupboard then bags of vegetables in the freezer. But, if you can get fresh buy fresh.
Do you ever just love something but do not permit yourself to buy? I love peaches, but I refuse to buy as so expensive, even when in season. But, if you like something and the item is in season, treat yourself!
Also, do you ever see a sign along the road saying "Produce For Sale"? Support your local gardener.
Again, read the highlighted link for some useful tips on how to save money on produce