I've been purchasing all of the cleaning supplies and food for my bf and I for the past five months. The first time we went out together he was just throwing things in the basket and it was about $250 when we checked out (he paid and what we got food-wise lasted about a week and a half). I was floored and asked if he wanted me to take it over

. I now spend about $300-$320 a month and that includes cleaning supplies (toilet paper, paper towels, laundry detergent, etc.) and dog food.
We're not breakfast eaters (I just have a big canister of oatmeal at work if I get hungry for something) and he eats the crappy-for-you $2.99 special at Wendy's every day for lunch (I don't factor that in to my spending for the rest of the stuff as it's his money). I tried buying lunch stuff but he's on the road constantly and in and out of his office so he never knows where he'll be for lunch (and the man loves his $2.99 special

). I buy either a half gallon of milk and a box of cereal (Special K vanilla and almond) or make peanut butter and banana sandwiches for my lunches.
We eat at home every night except occasionally (1-2 times a month) we'll go out to eat with my parents (they always pay though

). We do eat meat with every dinner (I could [and have] give it up but he couldn't). My co-worker and my Mom give me all of their leftover coupon pages from their newspapers (I don't buy the newspaper) so I get a lot of coupons that way and I print some online. I go online and look at a couple of stores' weekly ad's and then put our dinner list together from that. I shop once a week with a calculator (so I know how much I'm spending as I go along) and I only take whatever that week's grocery budget is out in cash from the ATM before I go shop. That way I don't spend next week's grocery budget money and I make sure I'm staying on track.
At first it was difficult as I didn't really know how much things I was buying actually cost. Now I have a general idea and that helps with the planning.
I also make as much as I can from scratch. I don't buy the boxes or frozen packages and I read the label to make sure I'm not getting a bunch of junk (i.e. the off-brand of salad dressing usually has a lot better ingredients than the name brand, like most of Kroger brand salad dressing have sugar and most other brands have HFCS). And most of the time I buy off-brand if I don't have a coupon or it's a better deal.
I don't assume
Walmart to have the better deals either. I used to never shop at Walmart and about a month ago I did as everyone goes on and on about how much cheaper it is. The tampons, toilet paper, scrub sponges, dishwasher detergent, and paper towels were all $1-2 more than what I buy them for at Kroger or Food Lion

.
I'm planting a garden soon and think that will save on some items (if I can get anything to survive

).