Coupons

     After you you have done your menu planning, or maybe in conjuction with your menu planning. Go through the Sunday paper and Wednesday paper and other mailers with coupons, and look for good deals on the stuff you want to eat, drink or use.  Some people organize them by product category and or expiration date.
Also check online to each manufacturer and see if they have any online printable coupons.  I-phones now have coupons on them from various manufacturers with their special applications.

Stay away from some conglomerated coupon sites as they have all kinds of malware, adware, and viruses that will mess up your computer, if you're not aware of what's happening.

In some communities, some stores might have double and triple coupon days. Make sure to take advantage of those.

There is a cable TV show, now called Extreme Couponing.  It shows big drama of a checkout, where the savings comes up big with total costs down 91 - 98 % off.