Toilet paper, canned soup, orange juice, frozen vegetables.
Boneless chicken breasts when on sale. I buy 5 or 10 pounds, saute or bake them, and freeze individually wrapped. When I want to use a couple, they thaw in the fridge in about 24 hours.
I few times a year I roast a chicken, make chicken stock, and freeze. I get about six 1-quart bags so it’s like $12 worth of stock, a dinner and several lunches from a $5 chicken.
When I get stuff from the bulk aisle I buy a lot – dry beans, raisins, oatmeal, rice, walnut pieces.