I remember some talk show where they brought on some “financial expert” to help those saving money. The #1 common way to waste money is eating out often. Cooking at home will help you save alot of money, and will help your strength/physique goals at the same time. Other than that, I started shopping at more economically friendly grocery stores like Food 4 Less and Superior Grocery.
The usual Ralphs or Vons might sell skinless boneless chicken for $7 a pound, where these other stores sell it for less than $2 a pound. Broccoli went from $2 a lb to .39 cents a lb. I literally cut my food shopping cost by half if not more.