The key is to buy the things you KNOW you will use, stock up to last you until the next sale.
Some sales are cyclic in nature or during certain times of year.
Right now it would be snacks, pop, meat for the upcoming holiday weekend. Snack items, breakfast bars, cereals, lunch meat for back to school lunches. Before the winter holidays it will be turkey, ham, baking supplies... etc.
My local stores have B1G1 gold n plump chicken sale about every 3 weeks, I can plan ahead by buying multiples when on sale.. not buy when it's full price... and look for coupons while waiting for the next sale.
Think of what you consider a "good price" and try to beat it with coupons and sales. My "buy price" for cereal was $1 a box, over time I've learned to use sale promotions and double coupons to push my "buy price" to .50 or FREE!
Look for coupons everywhere!
Newspaper (Sunday, early Sunday edition on Saturday), online printables (coupons.com, redplum, smartsource, Facebook, company websites), on products (peelies), tear pads on displays, from machines in the aisles (blinkies). Magazines (All You is worth paying for a subscription), state fair, product demos... Be creative looking and asking for extras: Recycling bins, fast food restaurants, neighbors/ friends/ family
Organize your coupons. I like the binder method but I know some like to just file inserts by date. Cutting only when they need it for a sale. I started with basic envelopes bundled together and filed under broad categories like dairy, canned foods, paper products, cleaning.
Never pay full price for cleaning supplies, shampoo, razors, toothpaste, toothbrush, lotion, soap.. there is always a deal at Walgreen's, CVS, Rite Aid to pay pennies for those high priced money sucking items.
I agree with another poster, do some sleuthing to find a blogger (or Facebook page) in your area that posts how to find the best deals. Let someone else do the footwork, as you learn the process you too can contribute.
Highly recommend being on Facebook, the most
awesome high value coupons can be printed when you "like" a product. $2 off pizza coupons on Facebook netted me single size pizzas for 50 cents each.
Join Vocalpoint, they send you high value coupons and samples to try new products.
Have fun!