I usually do one big shopping trip to publix a month, with milk/bread runs to the local grocery store. I also purchase ALL of my hygeine, paper products, trash bags and detergents at the dollar general store. We were spending about $450 a month on all that stuff for just two people...
and then I found the feed store back in March, picking up all the animal supplies there has saved me well over $100 a month because I can get a 40 pound bag of good dog food for $28 rather then a 30 pound bag of only okay food at publix for $25. The dogs are eating A LOT less of the new food because it's more suited for their breeds, so we are getting by on about one bag every 2 or 2 and a half weeks. Added to the savings of purchasing all the kitty supplies and the flea meds etc...
I only get paid once a month, so the first two weeks we eat a lot of fresh veggies and fruits and lunchmeat... switching to foods with more preservatives as it gets closer to the 15th. We also do not eat out very much, and when we do it's always someplace like subway where we can both eat for less then $15.
I suppose I could save some money going to the commisary... but since we are both working, I'm paying to avoid the driving.