Buying breasts alone is very expensive. Turkey offers better value than chicken. Larger turkeys are more economical than smaller ones because they have a higher proportion of meat to bone. Freeze leftover turkey for use in sandwiches and casseroles later. Chicken livers are good broiled, folded into omelets, or chopped and made into a spread.
Smelts are usually much less expensive than salmon, halibut or sole.
Raise herbs as house plants. Frozen vegetables in special sauces are expensive. Buy plain, frozen or canned vegetables and add your own seasonings or sauces. It's much cheaper. Potatoes are cheap only if you prepare them from fresh.