Never eat out.

If possible/reasonable walk to the grocery store. Basically if you can carry it you need it. No backpack. Keeps you busy for awhile walking then slows down your shopping to must haves only based on what you can carry.

Shop for your groceries online. You can stay within your budget every time, no impulse buying and focus on whatever is on sale. And if you pick it up yourself there’s no delivery fee.

Lentils and rice, repeat frequently.

I crumble crackers into my tuna salad to add volume and found i enjoy the taste.

 Soup, spaghetti,  chicken and vegetable  rice.  Make enough for three days.

Add rice to ramen broth after finishing the noodles to extend the life.

Out of tooth paste? Cut the tube open and scrape it clean.

Freezing day-old bread. Keeping bread refrigerated. Always. Lasts forever.