When I shop - I do a once a month stock up, then pick up fresh produce and meat weekly, and with that includes milk, bread, juice and things you always run out of.
I always take my coupons with me so if something is a great buy then it will be a better buy with my coupons. Take time to check out the sales ad as you enter, I have found coupons in the Ad racks that were not in the paper. Also check out when they have tasting, alot of time there are coupons for now and then again later on.
With the stock up - I check the sales ad's - Publix, Walmart, Target, and once in a great while Kroger. I make a list of what I need, any upcoming events, birthday, company coming over, or if I need to take a dish somewhere, hoildays in that month.
Then I match up coupons to ads, always check for store coupons, Publix and Target are the best match for store coupons and coupon from the paper or on line for my families needs. Don't forget rainchecks, most store offer them ask it can't hurt.
With the weekly shopping I normally only go to publix, and the produce market, again taking my coupons with me, sometimes there might be something not advertised that is on sale. By buying whats in season saves money.