Though where you live, how many in your family certainly impact (as does product choices)
We live in a small city in the midwest. 5 of us--DH, me, DS16, DD13 & DD11. I spend about $600/month on groceries (not household items).
I watch sales, clip coupons (ONLY on items we use regularly; no one doubles in our area, so I cannot maximize that kind of savings), stock up when things are on sale.
Our meat is typically ground beef/turkey and chicken breasts. But I often catch pricier cuts of meat marked down at Super Target & toss them in the freezer. I refuse to spend more than $3/lb. for protein since we typically need 2 lbs. for 5 of us (and a couple of meals for DH & my lunch the next day--IF we are lucky). I buy fresh fruit every week--sales/season dictate this, except bananas, which we get every week. (cheap & always in season). We go through about 4 gallons of milk/wk.
My pantry/fridge/freezer are ALWAYS stocked with basics as well as some well-priced convenience items (frozen pizza, chicken nuggets, soups, pastas, canned/frozen fruits/veggies, cheese, juices)--for 2 reasons. 1--we ALWAYS have food for meals. 2--I can stock up on these items when they are on sale, and control my expenses (our food bill has averaged $600/month for YEARS, due to watching sales & stocking up, I truly believe)
A typical dinner is protein, starch, veggie, fruit, milk.
Weekday breakfast is cereal, toast, bagels, Sunbelt breakfast bars.
I plan meals weekly based on what is in the freezer. I keep a list of proteins in the freezer, then look through my recipe books/magazines & choose recipes that sound good to me. Planning is VERY VERY important...I am less likely to waste money buying things that I don't need/aren't on sale/are too pricey, nor do we go out as often.
I work full-time, have very active kids & am trying hard to workout everyday immediately after work (4:30-5:30). So I am focusing On crockpot or 30 minute meals these days. This is working VERY VERY well. I crocked 4x this week, and it is nice as there is always something to eat.