This is another super useful (and easy!) method that I learned from Budget Bytes.
There is something super satisfying about buying a bag of plain old dry beans, and turning them into a useful ingredient to keep stocked in your freezer or fridge. You can save a lot of money (she calculated that cooked beans from dry are about half the cost of canned), but I think the real savings comes in the fact that you can freeze in containers for whatever size you will need for a future meal. So, if you have a small family that won't use an entire can, you won't find yourself wasting (or overeating to finish it up) just because the cans are always one standard size.